rref
: row reduction to echelon form. At level 2, the list
of pivoting coefficients is given, this is useful to treat particular
cases.
RANG
: like rref
but creates 0 only under the diagonal.
det
and RDET
:
determinant (using respectively
the O(n*n!) algorithm or row reduction)
INVL
: inverse of a matrix using row reduction
LU2
: given a square matrix, returns L-1 and U s.t.
A=LU (i.e. A=stk2
stk1
) where L and U
are lower and upper triangular
(maybe w.r.t. to a permutation matrix, this means that computing
the inverse of L or U is trivial). For comparison, the built-in
LU
returns three matrices L, U and P s.t. A=PLU.
SYST
and SOLGEN
: solution of a linear system.
1 SF
). If flag 1 is cleared (1 CF
),
you get directly the results.