linsolve bug

[Albert Chan]

100×100 matrix, speed ratio dropped to 2X, which may be due to XCas versions alone

randseed(0);
m := float(ranm(100,100));
time(inverse(m))

Note: both XCas versions produce same random matrix, and can be inverted.

Code:

XCas-1.5.0  TIME
digits:=12  0.011  (53 bits double)
digits:=16  16.    (54 bits MPFR)
digits:=32  18.    (107 bits MPFR)

XCas-1.9.0  TIME
digits:=12  0.0055 (48 bits)
digits:=16  6.4    (54 bits MPFR)
digits:=32  7.4    (107 bits MPFR)