I have a sage worksheet using small functions such as def vMatrix(M): Lmat=[] for i in [0..1]: for j in [0..1]: Lmat.append(M.subs(y==1-m^2-m^4)[i,j].taylor(m,0,4)) return Matrix(2,Lmat)
At the beginning, it works perfectly (computing approximations of matrices with parameters) but after using it several times, it stops computing the Taylor expansion of the coefficients, and simply returns the matrix.
I'm getting crazy with that :(
Does someone has an idea on what's happening?
Thx Leo