Nouvelles versions HP-Prime 6940 et 6975
Posted: 27 Dec 2014, 18:25Hewlett Packard a récemment publié deux nouvelles mises à jour du firmware HP-Prime et des logiciels dédiés HP-Connectivity Kit et HP-Prime Virtual Calculator :
Les versions 6940 ont été rapidement retirées des serveurs de HP, peut-être suite à un signalement de problème avec le moteur de calculs RPN, et remplacées quelques jours plus tard par les versions 6975.
Une première nouveauté consiste en l'ajout d'une interface de déverrouillage tactile, comme sur les tablettes. 
Le menu mémoire se montre un peu plus bavard et nous permet enfin de découvrir exactement les capacités utilisables à vide de la calculatrice : 
Un gros reproche que l'on pouvait faire à toutes les versions précédentes, était l'absence de barre de progression lors des transferts de fichiers, aussi bien sur le logiciel que sur la calculatrice. Dès que le fichier était un peu gros, ce transfert se réalisait à l'aveugle, avec nombre de problèmes si l'on demandait un nouveau transfert alors qu'il n'était pas terminé. 
Désormais, logiciel et calculatrice disposent tous deux de barres de progression. Enfin - il était grand temps !
Un autre gros reproche concernait le transfert de gros programmes, dont entre autres ceux générés avec le convertisseur de PDF en ligne mViewer GX Creator. Régulièrement, la calculatrice plantait en fin de transfert et devait être redémarrée, ce qui nécessitait de s'assurer d'avoir l'outil adéquat sur soi, le trou étant bien trop fin pour une pointe de stylo.
Il parait qu'il y a eu des améliorations au niveau du transfert de fichiers, alors expérimentons en tentant de transférer 2,65Mo de fichiers mViewer GX :
Les informations sont ici incohérentes. Les 2,65Mo de programmes mViewer GX Creator ont bien été retirés de la mémoire Flash disponible, mais la mémoire vive disponible a également perdu ici 7Mo et est désormais dangereusement basse avec seulement 1,54Mo de libres...
En fait, en fin de réception de chaque fichier, il semble que ce dernier soit traité par la calculatrice, et que la mémoire soit mal nettoyée suite à cette opération. C'est une fuite de mémoire, qui explique le plantage par épuisement de la RAM disponible qui a pourri la vie de nombre d'utilisateurs depuis un an.
Tentons donc de transférer un dernier fichier mViewer GX...
Bonne nouvelle, nous n'obtenons plus de plantage en fin de transfert. En fait désormais, le transfert ne démarre même pas et une erreur de mémoire est signalée - c'est mieux.
Mais en pratique, vous devrez là encore redémarrer la calculatrice pour libérer la mémoire RAM perdue.
Au final rien ne change donc pour l'utilisateur, qui devra continuer de redémarrer sa HP-Prime tous les 2-3Mo de données transférées. Le remplissage des 197.85Mo utilisables s'annonce comme un véritable parcours du combattant - je vous souhaite bon courage !
Comme d'habitude, de très nombreuses autres corrections de bugs ou améliorations ont été apportées, notamment au niveau du moteur CAS. Voici ci-dessous le changelog officiel :
Hélas le problème des suites numériques qui ne peuvent être définies à partir du rang 0 reste non corrigé, et va continuer de causer des problèmes aux lycéens de séries générales et technologiques dès la classe de Première, et la HP-Prime reste à ce jour à mon avis rien qu'à cause de cela l'un des plus mauvais choix pour un lycéen parmi les trois constructeurs historiques.
Toutefois, une amélioration de l'application suites remédiant enfin à ce problème nous a été annoncée pour 2015 lors du salon APMEP en novembre 2014.
15 mois après le lancement de la calculatrice HP-Prime, HP semblerait enfin se préoccuper de corriger les problèmes qui nous semblaient prioritaires car concernant l'utilisateur non expert, et pour certains d'entre eux tous les utilisateurs. C'est indéniablement une bonne nouvelle !
Toutefois, 16 mois après son lancement la HP-Prime n'est visiblement toujours pas au point. Même si HP montrerait enfin une volonté de corriger cela, savoir qu'il leur a fallu 15 mois pour commencer à s'intéresser à ces problèmes essentiels n'est absolument pas encourageant pour l'avenir...
Téléchargements :
- les versions 6940 datées du 24 novembre
- les versions 6975 datées du 3 décembre
Les versions 6940 ont été rapidement retirées des serveurs de HP, peut-être suite à un signalement de problème avec le moteur de calculs RPN, et remplacées quelques jours plus tard par les versions 6975.
Une première nouveauté consiste en l'ajout d'une interface de déverrouillage tactile, comme sur les tablettes. 
Le menu mémoire se montre un peu plus bavard et nous permet enfin de découvrir exactement les capacités utilisables à vide de la calculatrice : - 11.16Mo de mémoire vive (RAM) accessibles par l'utilisateur pour une puce de 32Mo
- 197.85Mo de mémoire de stockage accessibles par l'utilisateur pour une puce de 256Mo - à ce jour le record de capacité pour une calculatrice graphique
Un gros reproche que l'on pouvait faire à toutes les versions précédentes, était l'absence de barre de progression lors des transferts de fichiers, aussi bien sur le logiciel que sur la calculatrice. Dès que le fichier était un peu gros, ce transfert se réalisait à l'aveugle, avec nombre de problèmes si l'on demandait un nouveau transfert alors qu'il n'était pas terminé. Désormais, logiciel et calculatrice disposent tous deux de barres de progression. Enfin - il était grand temps !
Un autre gros reproche concernait le transfert de gros programmes, dont entre autres ceux générés avec le convertisseur de PDF en ligne mViewer GX Creator. Régulièrement, la calculatrice plantait en fin de transfert et devait être redémarrée, ce qui nécessitait de s'assurer d'avoir l'outil adéquat sur soi, le trou étant bien trop fin pour une pointe de stylo.
Il parait qu'il y a eu des améliorations au niveau du transfert de fichiers, alors expérimentons en tentant de transférer 2,65Mo de fichiers mViewer GX :
Les informations sont ici incohérentes. Les 2,65Mo de programmes mViewer GX Creator ont bien été retirés de la mémoire Flash disponible, mais la mémoire vive disponible a également perdu ici 7Mo et est désormais dangereusement basse avec seulement 1,54Mo de libres...
En fait, en fin de réception de chaque fichier, il semble que ce dernier soit traité par la calculatrice, et que la mémoire soit mal nettoyée suite à cette opération. C'est une fuite de mémoire, qui explique le plantage par épuisement de la RAM disponible qui a pourri la vie de nombre d'utilisateurs depuis un an.
Tentons donc de transférer un dernier fichier mViewer GX...Bonne nouvelle, nous n'obtenons plus de plantage en fin de transfert. En fait désormais, le transfert ne démarre même pas et une erreur de mémoire est signalée - c'est mieux.
Mais en pratique, vous devrez là encore redémarrer la calculatrice pour libérer la mémoire RAM perdue.
Au final rien ne change donc pour l'utilisateur, qui devra continuer de redémarrer sa HP-Prime tous les 2-3Mo de données transférées. Le remplissage des 197.85Mo utilisables s'annonce comme un véritable parcours du combattant - je vous souhaite bon courage !
Comme d'habitude, de très nombreuses autres corrections de bugs ou améliorations ont été apportées, notamment au niveau du moteur CAS. Voici ci-dessous le changelog officiel :
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HP Prime – Release Notes
-------------------------
Date Released: 2014/11/24
Internal Versions
-----------------
Firmware Version: 2014 11 24 (6940)
Virtual Calculator Version: 2014 11 24 (6940)
Connectivity Kit: 2014 11 24 (6940)
Description
-----------
This release of the Prime Calculator firmware and associated PC software delivers significant new features and fixes outstanding issues. This document is not a complete list of all changes, but highlights specific items. All users of the HP Prime calculator are encouraged to upgrade for the best possible experience.
Primary focus in this release was enhancements to communication and wireless.
New Functionality (Connectivity Kit)
------------------------------------
User interface refined and improved.
Much more reliable and capable communication.
Multiple antennas supported for wireless communication.
Progress bars are now shown for individual units during transfer data transfer.
Much nicer "firmware update" window - adds support for detection of multiple units and more ways to receive prompts for updating units.
Now possible to send a single item from one unit to everyone in the class in a single step.
Improvements to screen monitoring.
New Functionality (Calculator Software)
---------------------------------------
Added lower/upper optional inputs in cumulative probability functions. Binomial arguments now consistently ordered.
Add ability to mix and edit CAS functions inline as part of larger programs - #cas to start a block, and #end to end it.
New variables Notes and Programs created to allow programatic access.
Geometry variables Instruction and DelInstruction provide programatic access to geometry constructions.
Much faster scrolling in large notes, programs and equations.
There is now an "Info" menu key in the memory manager. It reports free ram and available storage.
VARS menu now has a "system" group which contains general system variables.
TOff variable introduced. It is a millisecond value with minimum of 5s.
TIME was renamed to TEVAL to avoid confusion with Time variable. Also now shows up in the catalog.
SERIAL and VERSION commands introduced.
Added an implicit_diff command to simplify implicit differentiation steps.
Improved help throughout system and connected it in more places.
New Functionality (Virtual Calculator)
--------------------------------------
Japanese user interface turned on for menus.
There is now an "Info" menu key in the memory manager. It reports used ram and available storage.
Resolved issues and changes excluding CAS
-----------------------------------------
1. Resolved potential issue pasting formatted text into notes.
2. Improved cursor positioning when working with very large notes or programs.
3. Resolved issues with style selection in note editor.
4. Resolved issue using large font in inference table view.
5. Resolved issue storing into some inference variables from the command line.
6. Improved spreadsheet to allow loading old format without issue.
7. Resolved issue where plotfunc in command line could blink while help was open.
8. Resolved issue with vector use involving MAKELIST and list2mat.
9. Resolved issues with printing some messages from the CAS.
10. Resolved issue where connectivity kit did not allow an empty password for exam mode.
11. e^t^2 not printing with parens making it appear wrong. As part of fix, removed superscript 2 character from [x^2] key. Now does ^2 instead.
12. Resolved some issues with various FILLPOLY inputs.
13. Resolved issue with Send button not showing up on the emulator when selected to communicate with a calculator.
14. Resolve issue in connectivity kit where menu cut/copy/paste were not always working in some places.
15. Improved poll response to prompt for verification on single send, or with missing responses.
16. Resolved issue with digit grouping making equations appear strangely in a few locations.
17. Resolved an issue where [a b/c] could hide a negative sign.
18. Resolved issue with using matrix store notation M1(5,1) on a vector.
19. Resolved many issues in INPUT command. Also, chooser indexes in INPUT command were 0 based instead of 1.
20. Introduced "Fit" variable in 2var statistics to programmatically control fit line removal.
21. Resolved issue involving SetFreq.
22. Resolved issue using built in function variables in makelist. ex: MAKELIST(F1,X,1,5,1)
23. Brought back OS version on help about screen.
24. Improved color choosers through system so initial color selection matches the current selection.
25. Improved first boot screen.
26. Resolved issue with REGRS command and trig fit.
27. Some "NIST" group went and changed the definition of Faraday.
28. Resolved issues with alphabetical app sorting.
29. Switched to have fsolve in CAS->solve menu instead of less capable nSolve command.
30. Improved the exam mode password/time screen to show remaining time better.
31. Improved sleep to avoid the calculator from sleeping while streamer is connected and active.
32. Resolved issue where terminal scrolling could hang system. Also added a titlebar on the terminal.
33. Resolved issue with E+5/ interpreted as (E+5)/ instead of E+5/
34. Removed ` from catalog. (auto eval quote)
35. Resolved issue with program dialog box and digit grouping.
36. Resolved memory issue in parser when using ICON keyword.
37. Resolved issue where a matrix stored by M2:=M1 in home edited both M1 and M2.
38. Resolved issue with digit grouping in solve application preventing solving with numbers >1000.
39. Resolved issue with kinetic scrolling and editors.
40. Enlarged size of advanced graphing memory so more scrolling can happen before redraw is needed.
41. Resolved issue where define F1=..., F2=d F1(X) / X=X in symb, PLOT view, and then exit could cause undesirable effects.
42. Resolved display issue where DMS value -1<x<0 was not showing negative sign.
43. Improves Function app/Plot/Fcn/Root reports for some functions that jump over zeros.
44. Resolved issue where STRING function was not working well with 4 or more parameters.
45. Resolved issue where DRAWMENU was not able to use pictures as sources
Resolved issues and changes in CAS
----------------------------------
1. Improved simplify handling of surd/nthroot
2. concat now accepts more than 2 arguments
3. Fix for int(1/x^2,x,0,inf)
4. Fix for fisher_cdf(5,6,2.1,∞)
5. Changes for arcLen - support for curves having more than one arc and for points instead of parameter values for boundaries
6. Additional checks for low accuracy integrals by gaussian quadratures to avoid Romberg method, example int(1/sqrt(1-x^6),x,0,1.)
7. Improves multiple integrals like int(int(int(sqrt(x^2+z^2),z,-sqrt(y-x^2),sqrt(y-x^2)),y,x^2,4),x,-2,2)
8. Fix for desolve(y''=1/x^2)
9. Fix for sign, for example sign(sin(6283185307179586/1000000000000000))
10. Fix for int((1-x)^(2/3)*x^(1/3),x,0,1)
11. Fix for expand(x*2.9e-13+6.3e-13)
12. Enables new syntax for substitution in expression like f:=x^2+1; f(x=1)
13. int(1/sqrt(1+x^3),x,0.0,∞) now returns an approximate answer
14. Fix for (f)solve(((3.068E-3/(0.118+1.001E-5*X))-(((1+2.126E-5*X)/(1+8.506E-5*X))-(0.3+2.55E-5*X)))=0,X);
15. Setting default arg to 0 in piecewise to make limit work
16. Added support for complex numbers in pmin
17. Fix for limit((-9x^69+x^47+10)/(-7x^69+x^46+10),x=inf)
18. Remove autosimplification after 'reorder'
19. Fix for limit(surd(3^x+5^x,x),x,inf)
20. Fix for solve(6e-34*f=g,f)
21. Sort proot output
22. If taylor or series have polynom as optional last arg, the order_size term is removed (shortcut for convert(series(...),polynom) to series(...,polynom))
23. Improve warning for some ode that can not be solve explicitly
24. Fix for int(x²/(9+x^6),x,-inf,inf), int(1/(x^2 + 6*x + 12),x,-inf,inf)
25. Fix for trigtan(sin(x)/cos(x)) and for cSolve(x^4-1=3)
26. SVD warnings for exact/symbolic matrices
27. Fix for GD:=line(y=(4859/2500*ln(20)+631/125+(-4859/100000*ln(20)-631/5000)*x)):;GG:=plotfunc(1.301*ln(x)+3.406,x,-50,50):;single_inter(D,G);
28. Changed ihermite to return a list
29. Simplification of conj(conj()), conj(re()) and conj(im())
30. median({1,2,3,4}) returns 2.5
31. rsolve now handles homographic recurrences if the fixed point has multiplicity 2
32. Computation of Beta(x,y) if x>0, y>0 and x+y is integer, recognition of integrals solvable by Beta, e.g. int(x^(1/3)*(1-x)^(2/3),x,0,1)
33. If partfrac optional 2nd argument is a sqrt, does partial fraction expansion with factorization over this field extension
34. Fixes for rootof (root selection and i with rootof)
35. Improves arg and evalc for pow of complex numbers
36. Fixes solve with piecewise containing a sqrt
37. Fix for solve(x^5=-1)
38. laplace now switches to exact mode
39. Fix for piecewise in regroup and solve
40. Fix order for regroup (fraction/monomials)
41. Fix for SVD
42. Fix for string(matrix), sum(sin(n*x)/n^2,n,1,inf), fsolve in degree mode without interval/guess
43. Fix for Groebner basis and fix for comparing 2 symbolic complexes having the same imaginary part
44. Improves some simplifications like abs(exp(i*x)+1) and some integrals of periodic function over a period
45. Avoid rootofs for some factorizations
46. Change for product/sum, e.g. for product(n,n,1/2,3,1/2)
47. Calls exact on limit arguments
48. Change piecewise printing to CASE
49. Fix for int(exp(-x)/(1+x^2),x,0,inf)
50. Fix complexroot(x^3+8,1e-5,0,2+2*i)
51. Fix for solve(sin(x)=sin(2x))
52. Accept = instead of - in zeros and czeros
53. Call normal on inverse of matrix
54. Fix for int(abs(sin(x)-cos(x-1)),x,0,3)
55. fsolve now returns itself if the equation has more than 1 var, making commands like fsolve(int(fsolve(x^5+x=y,x,1e-14),y,0,t)=1/3,t=1.0) possible
56. Improve detection of polynomial equation by fsolve. If fsolve has only one solution in a polynomial equation, returns the solution instead of a list of one solution
57. Fix printing of ()^.5 (was incorrectly printed as sqrt())
58. Fix for int(1/surd(x-1,5),x,1,33)
59. Fix for desolve(y''+1/(x+1)=0,x,y)
60. Make resultant with 0 return 0
61. Fix for ifactor(373196531)
62. Fix for SVD of matrices having more columns than rows
63. Make sorta/sortd work with complex numbers (sorting by real parts)
64. Changed number of Pollard-rho tries for ifactor(2^101+5), removed some optimizations that seems to fail in some rare occurrences
65. Integration - small improvement recognizing f(u)*u' pattern
66. pmin now accepts sqrt and other algebraic extension of Q
67. round([a,b],c) fixed
68. Make limit(exp(-1/x^2)/x,x=0) work
69. Fixed iquorem to behave like iquo+irem with negative integers
70. Fix for int(frac(x),x,-1,2), int(frac(x),x,0,6.4)
71. Fix for int(sqrt((t-5*cos(t))^2 + (6*cos(1+sin(t)))^2),t,0,3)
72. Fix for factor(3*a*cos(sqrt(3)*ln(-x)/2)-b*sin(sqrt(3)*ln(-x)/2)-sqrt(3)*a*sin(sqrt(3)*ln(-x)/2)+sqrt(3)*b*cos(sqrt(3)*ln(-x)/2))
73. Fix for sum_riemann(1/sqrt(n^2+k^2),[n,k])
-------------------------
Date Released: 2014/11/24
Internal Versions
-----------------
Firmware Version: 2014 11 24 (6940)
Virtual Calculator Version: 2014 11 24 (6940)
Connectivity Kit: 2014 11 24 (6940)
Description
-----------
This release of the Prime Calculator firmware and associated PC software delivers significant new features and fixes outstanding issues. This document is not a complete list of all changes, but highlights specific items. All users of the HP Prime calculator are encouraged to upgrade for the best possible experience.
Primary focus in this release was enhancements to communication and wireless.
New Functionality (Connectivity Kit)
------------------------------------
User interface refined and improved.
Much more reliable and capable communication.
Multiple antennas supported for wireless communication.
Progress bars are now shown for individual units during transfer data transfer.
Much nicer "firmware update" window - adds support for detection of multiple units and more ways to receive prompts for updating units.
Now possible to send a single item from one unit to everyone in the class in a single step.
Improvements to screen monitoring.
New Functionality (Calculator Software)
---------------------------------------
Added lower/upper optional inputs in cumulative probability functions. Binomial arguments now consistently ordered.
Add ability to mix and edit CAS functions inline as part of larger programs - #cas to start a block, and #end to end it.
New variables Notes and Programs created to allow programatic access.
Geometry variables Instruction and DelInstruction provide programatic access to geometry constructions.
Much faster scrolling in large notes, programs and equations.
There is now an "Info" menu key in the memory manager. It reports free ram and available storage.
VARS menu now has a "system" group which contains general system variables.
TOff variable introduced. It is a millisecond value with minimum of 5s.
TIME was renamed to TEVAL to avoid confusion with Time variable. Also now shows up in the catalog.
SERIAL and VERSION commands introduced.
Added an implicit_diff command to simplify implicit differentiation steps.
Improved help throughout system and connected it in more places.
New Functionality (Virtual Calculator)
--------------------------------------
Japanese user interface turned on for menus.
There is now an "Info" menu key in the memory manager. It reports used ram and available storage.
Resolved issues and changes excluding CAS
-----------------------------------------
1. Resolved potential issue pasting formatted text into notes.
2. Improved cursor positioning when working with very large notes or programs.
3. Resolved issues with style selection in note editor.
4. Resolved issue using large font in inference table view.
5. Resolved issue storing into some inference variables from the command line.
6. Improved spreadsheet to allow loading old format without issue.
7. Resolved issue where plotfunc in command line could blink while help was open.
8. Resolved issue with vector use involving MAKELIST and list2mat.
9. Resolved issues with printing some messages from the CAS.
10. Resolved issue where connectivity kit did not allow an empty password for exam mode.
11. e^t^2 not printing with parens making it appear wrong. As part of fix, removed superscript 2 character from [x^2] key. Now does ^2 instead.
12. Resolved some issues with various FILLPOLY inputs.
13. Resolved issue with Send button not showing up on the emulator when selected to communicate with a calculator.
14. Resolve issue in connectivity kit where menu cut/copy/paste were not always working in some places.
15. Improved poll response to prompt for verification on single send, or with missing responses.
16. Resolved issue with digit grouping making equations appear strangely in a few locations.
17. Resolved an issue where [a b/c] could hide a negative sign.
18. Resolved issue with using matrix store notation M1(5,1) on a vector.
19. Resolved many issues in INPUT command. Also, chooser indexes in INPUT command were 0 based instead of 1.
20. Introduced "Fit" variable in 2var statistics to programmatically control fit line removal.
21. Resolved issue involving SetFreq.
22. Resolved issue using built in function variables in makelist. ex: MAKELIST(F1,X,1,5,1)
23. Brought back OS version on help about screen.
24. Improved color choosers through system so initial color selection matches the current selection.
25. Improved first boot screen.
26. Resolved issue with REGRS command and trig fit.
27. Some "NIST" group went and changed the definition of Faraday.
28. Resolved issues with alphabetical app sorting.
29. Switched to have fsolve in CAS->solve menu instead of less capable nSolve command.
30. Improved the exam mode password/time screen to show remaining time better.
31. Improved sleep to avoid the calculator from sleeping while streamer is connected and active.
32. Resolved issue where terminal scrolling could hang system. Also added a titlebar on the terminal.
33. Resolved issue with E+5/ interpreted as (E+5)/ instead of E+5/
34. Removed ` from catalog. (auto eval quote)
35. Resolved issue with program dialog box and digit grouping.
36. Resolved memory issue in parser when using ICON keyword.
37. Resolved issue where a matrix stored by M2:=M1 in home edited both M1 and M2.
38. Resolved issue with digit grouping in solve application preventing solving with numbers >1000.
39. Resolved issue with kinetic scrolling and editors.
40. Enlarged size of advanced graphing memory so more scrolling can happen before redraw is needed.
41. Resolved issue where define F1=..., F2=d F1(X) / X=X in symb, PLOT view, and then exit could cause undesirable effects.
42. Resolved display issue where DMS value -1<x<0 was not showing negative sign.
43. Improves Function app/Plot/Fcn/Root reports for some functions that jump over zeros.
44. Resolved issue where STRING function was not working well with 4 or more parameters.
45. Resolved issue where DRAWMENU was not able to use pictures as sources
Resolved issues and changes in CAS
----------------------------------
1. Improved simplify handling of surd/nthroot
2. concat now accepts more than 2 arguments
3. Fix for int(1/x^2,x,0,inf)
4. Fix for fisher_cdf(5,6,2.1,∞)
5. Changes for arcLen - support for curves having more than one arc and for points instead of parameter values for boundaries
6. Additional checks for low accuracy integrals by gaussian quadratures to avoid Romberg method, example int(1/sqrt(1-x^6),x,0,1.)
7. Improves multiple integrals like int(int(int(sqrt(x^2+z^2),z,-sqrt(y-x^2),sqrt(y-x^2)),y,x^2,4),x,-2,2)
8. Fix for desolve(y''=1/x^2)
9. Fix for sign, for example sign(sin(6283185307179586/1000000000000000))
10. Fix for int((1-x)^(2/3)*x^(1/3),x,0,1)
11. Fix for expand(x*2.9e-13+6.3e-13)
12. Enables new syntax for substitution in expression like f:=x^2+1; f(x=1)
13. int(1/sqrt(1+x^3),x,0.0,∞) now returns an approximate answer
14. Fix for (f)solve(((3.068E-3/(0.118+1.001E-5*X))-(((1+2.126E-5*X)/(1+8.506E-5*X))-(0.3+2.55E-5*X)))=0,X);
15. Setting default arg to 0 in piecewise to make limit work
16. Added support for complex numbers in pmin
17. Fix for limit((-9x^69+x^47+10)/(-7x^69+x^46+10),x=inf)
18. Remove autosimplification after 'reorder'
19. Fix for limit(surd(3^x+5^x,x),x,inf)
20. Fix for solve(6e-34*f=g,f)
21. Sort proot output
22. If taylor or series have polynom as optional last arg, the order_size term is removed (shortcut for convert(series(...),polynom) to series(...,polynom))
23. Improve warning for some ode that can not be solve explicitly
24. Fix for int(x²/(9+x^6),x,-inf,inf), int(1/(x^2 + 6*x + 12),x,-inf,inf)
25. Fix for trigtan(sin(x)/cos(x)) and for cSolve(x^4-1=3)
26. SVD warnings for exact/symbolic matrices
27. Fix for GD:=line(y=(4859/2500*ln(20)+631/125+(-4859/100000*ln(20)-631/5000)*x)):;GG:=plotfunc(1.301*ln(x)+3.406,x,-50,50):;single_inter(D,G);
28. Changed ihermite to return a list
29. Simplification of conj(conj()), conj(re()) and conj(im())
30. median({1,2,3,4}) returns 2.5
31. rsolve now handles homographic recurrences if the fixed point has multiplicity 2
32. Computation of Beta(x,y) if x>0, y>0 and x+y is integer, recognition of integrals solvable by Beta, e.g. int(x^(1/3)*(1-x)^(2/3),x,0,1)
33. If partfrac optional 2nd argument is a sqrt, does partial fraction expansion with factorization over this field extension
34. Fixes for rootof (root selection and i with rootof)
35. Improves arg and evalc for pow of complex numbers
36. Fixes solve with piecewise containing a sqrt
37. Fix for solve(x^5=-1)
38. laplace now switches to exact mode
39. Fix for piecewise in regroup and solve
40. Fix order for regroup (fraction/monomials)
41. Fix for SVD
42. Fix for string(matrix), sum(sin(n*x)/n^2,n,1,inf), fsolve in degree mode without interval/guess
43. Fix for Groebner basis and fix for comparing 2 symbolic complexes having the same imaginary part
44. Improves some simplifications like abs(exp(i*x)+1) and some integrals of periodic function over a period
45. Avoid rootofs for some factorizations
46. Change for product/sum, e.g. for product(n,n,1/2,3,1/2)
47. Calls exact on limit arguments
48. Change piecewise printing to CASE
49. Fix for int(exp(-x)/(1+x^2),x,0,inf)
50. Fix complexroot(x^3+8,1e-5,0,2+2*i)
51. Fix for solve(sin(x)=sin(2x))
52. Accept = instead of - in zeros and czeros
53. Call normal on inverse of matrix
54. Fix for int(abs(sin(x)-cos(x-1)),x,0,3)
55. fsolve now returns itself if the equation has more than 1 var, making commands like fsolve(int(fsolve(x^5+x=y,x,1e-14),y,0,t)=1/3,t=1.0) possible
56. Improve detection of polynomial equation by fsolve. If fsolve has only one solution in a polynomial equation, returns the solution instead of a list of one solution
57. Fix printing of ()^.5 (was incorrectly printed as sqrt())
58. Fix for int(1/surd(x-1,5),x,1,33)
59. Fix for desolve(y''+1/(x+1)=0,x,y)
60. Make resultant with 0 return 0
61. Fix for ifactor(373196531)
62. Fix for SVD of matrices having more columns than rows
63. Make sorta/sortd work with complex numbers (sorting by real parts)
64. Changed number of Pollard-rho tries for ifactor(2^101+5), removed some optimizations that seems to fail in some rare occurrences
65. Integration - small improvement recognizing f(u)*u' pattern
66. pmin now accepts sqrt and other algebraic extension of Q
67. round([a,b],c) fixed
68. Make limit(exp(-1/x^2)/x,x=0) work
69. Fixed iquorem to behave like iquo+irem with negative integers
70. Fix for int(frac(x),x,-1,2), int(frac(x),x,0,6.4)
71. Fix for int(sqrt((t-5*cos(t))^2 + (6*cos(1+sin(t)))^2),t,0,3)
72. Fix for factor(3*a*cos(sqrt(3)*ln(-x)/2)-b*sin(sqrt(3)*ln(-x)/2)-sqrt(3)*a*sin(sqrt(3)*ln(-x)/2)+sqrt(3)*b*cos(sqrt(3)*ln(-x)/2))
73. Fix for sum_riemann(1/sqrt(n^2+k^2),[n,k])
Hélas le problème des suites numériques qui ne peuvent être définies à partir du rang 0 reste non corrigé, et va continuer de causer des problèmes aux lycéens de séries générales et technologiques dès la classe de Première, et la HP-Prime reste à ce jour à mon avis rien qu'à cause de cela l'un des plus mauvais choix pour un lycéen parmi les trois constructeurs historiques. Toutefois, une amélioration de l'application suites remédiant enfin à ce problème nous a été annoncée pour 2015 lors du salon APMEP en novembre 2014.
15 mois après le lancement de la calculatrice HP-Prime, HP semblerait enfin se préoccuper de corriger les problèmes qui nous semblaient prioritaires car concernant l'utilisateur non expert, et pour certains d'entre eux tous les utilisateurs. C'est indéniablement une bonne nouvelle !
Toutefois, 16 mois après son lancement la HP-Prime n'est visiblement toujours pas au point. Même si HP montrerait enfin une volonté de corriger cela, savoir qu'il leur a fallu 15 mois pour commencer à s'intéresser à ces problèmes essentiels n'est absolument pas encourageant pour l'avenir...
Téléchargements :
- Firmware HP-Prime build 6975
- Logiciel HP-Prime Virtual Calculator build 6975 (émulateur)
- Logiciel HP-Prime Connectivity Kit build 6975 (logiciel de transfert)
