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Thanks. I opened an issue

conda-forge install SageMath 9.7 fails I tried to install SageMath 9.7 from conda-forge (my OS is Ubuntu 18.04) followin

Typically, the repr function returns a string that can be executed and yield the same value as the object. In sageMath, this is not the case for a matrix : repr has the same behaviour as the str function has and str applied to a matrix returns a "nice" representation of it:

M=matrix([[1, 1],[1, 1]])

print(repr(M)==str(M)) 
print(M)

printing

True
[1 1]
[1 1]

This is not the behaviour I was expecting. To compare with Numpy:

from numpy import array

M = array([[1, 1], [1, 1]])

print(repr(M))
print()
print(M)

outpouting

array([[1, 1],
       [1, 1]])

[[1 1]
 [1 1]]

Do I need to write my own repr function when applied to a matrix?

`repr` applied on a matrix Typically, the repr function returns a string that can be executed and yield the same value a

Emmanuel, thanks for your detailed examination.

assume causes a solving failure This code var("a b") assume(a, "real") equation=[a+b==0] s=solve(equation, a, b) print(