reported error

[Gilles-Paul-Dubois]

Link to the program

Everything works except exchanges of vectors proving that determinant is alternate (anti-symmetric) (last line of buttons). Under installed Python + vpython everything OK !

[Gilles-Paul-Dubois]

link to another program
same problem as with previous program.
Everything OK except transformations (no reactions)
NB: This program is much simpler better to use than previous one to find out what is going wrong