First of all, I think Andrey the work you do is astonishing and thanks to all the community, too.

I have a problem, waht is wrong?

---

1. You should not use i's and j's as indices, because they also designate imaginary part of complex numbers. In some versions some of them, or both, cause errors when used otherwise.
2. You could use I and j as indices of k, not of C[k] or A[k].

It would be better if you attach the file.


Edit: Oh, it looks like you cannot assign anything to nested matrices...
Seems like you only can assign the whole new matrix to C[k].

Hello,

Try this


[MATH=eng]for(k,range(1,rows(A)),line(for(i,range(1,rows(),for(j,range(1,cols(),el(c,i,j):el(B,i,j)/el(el(A,k),i,j))),el(C,k):c,2,1))[/MATH]


[MATH=eng]C=mat(mat(4,2.5,2,1.75,1.6,1.5,3,2),mat(0.571,0.625,0.667,7,4,3,3,2),2,1)[/MATH]

It seems that direct assignment of a matrix element in a nested matrix is not allowed. Try to avoid such constructions - it will give trouble.

Regards,

The problem is in using nested indices on the left hand side. That does not work just as linear indexing of pre-allocated matrices does not work (would save a loop in the example).

---

I thank you all!