mailing-list for TeXmacs Users

[Михаил Бахтерев <address@hidden>]

Forgot to attach the file! Shame on me!

On Sat, Dec 12, 2020 at 08:25:13PM +0500, Михаил Бахтерев wrote:
> Greeting, TeXmacs users!
> 
> I'm relearning linear algebra algorithms for my current project,
> and i've found, that TeXmacs good for «notepad» workflows, so
> i'm using it to visualise matrices and other relative data.
> 
> But i'm hit strange error, and cannot understand what is causing
> it.
> 
> Attachment contains the Scheme code, which implements inverse
> matrix calculation via lup decomposition (Cormen algorithm).
> When i run this code (see the Testing section at the end of
> file) with Guile Scheme from console, i always get expected
> results. For instance
> 
> $ guile mmul.scm 
> (4798812820 2947166038 8605901937 1668829253) ; <- this is the A matrix
> (3262456359 8838015003 1557481481 3270092634)
> (171172813 9409289762 1357419403 4800934199)
> (9432354808 1354480021 2510360485 5482916884)
> 
> (9432354808 1354480021 2510360485 5482916884) ; <- this is reconstructed P 
> * A matrix
> (171172813 9409289762 1357419403 4800934199)
> (4798812820 2947166038 8605901937 1668829253)
> (3262456359 8838015003 1557481481 3270092634)
> 
> 3 ; <- This is P matrix representation
> 2
> 0
> 1
> 7
> 
> (1 0 0 0) ; <- this is A * (inverse A)
> (0 1 0 0)
> (0 0 1 0)
> (0 0 0 1)
> 
> But, when i load this code in TeXmacs Scheme session i get
> strange console output. For instance (in the result of
> evaluating (load "mmul.scm"))
> 
> WARNING: (guile-user): `receive' imported from both (kernel boot srfi) and 
> (ice-9 receive)
> (1824518241 5458396045 2655456309 6130377838)
> (2647726516 8160738062 4747358222 9690212499)
> (3133317917 5397980949 743583991 8628595145)
> (7288149089 9806540532 4929698641 2481269591)
> 
> (7288149089 9806540532 4929698641 2481269591)
> (850281521796992308/7288149089 
> -433474879616604043800916553102/2223115077637124927 
> 16719259231553166563679395186/2223115077637124927 
> -514716152454708799741106682579/2223115077637124927)
> (1824518241 5458396045 2655456309 6130377838)
> (3133317917 -286725186406368577856421475029/2223115077637124927 743583991 
> 8628595145)
> 
> 3
> 1
> 0
> 2
> 6
> 
> (1 0 0 0)
> (17072928790327166778760849184501179449622921216/9309701256049657709054838362264082416807641613
>  
> -2033734070649485744757270652366904646568574451/9309701256049657709054838362264082416807641613
>  
> 745398178510862613887104599240022568088895488/9309701256049657709054838362264082416807641613
>  
> -473525573379058173074395000195796253280305152/9309701256049657709054838362264082416807641613)
> (0 0 1 0)
> (0 0 0 1)
> 
> I do not understand completely, what is going on and what is
> the problem. May anyone provide any help?
> 
> - MB. Respectfully
> 
> P.S. If this is important, TeXmacs version is 1.99.15. The
> system is X86_64 ArchLinux

Attachment: mmul.scm
Description: Lotus Screencam