Hp50 Real Matrix does not allow subst aij real by a'ij complex

[John Keith]

(03-11-2023 08:03 PM)Gil Wrote:  How would you call such a Matrix
with complex and real numbers and no apparent algebraic expression
[[ (5.,6.) (5.,6.) ]
[ (7.,9.) 3 ]] ?

It's still a symbolic matrix. If you are in Exact mode and you create a new matrix with exact integers (no decimal points), the result will be a symbolic matrix. Also if you convert a list of lists to a matrix with AXL, it will be a symbolic matrix, even if the list elements are real or complex numbers. Symbolic matrices can be converted into real (or complex) matrices by the command AXM.