In a notebook, printing a sympy matrix is not difficult
However this doesn't work for formatted strings:
How can I do to maintain the symbolic representation in the formatted string?
Textual code:
import sympy
sympy.init_printing()
C = sympy.Matrix([[2, 3], [4, 5]])
display (C)
display (f'{C} x {C} = {C*C}')
In [1]: C = Matrix([[2,3],[4,5]])
In [2]: C
Out[2]:
⎡2 3⎤
⎢ ⎥
⎣4 5⎦
The f'{}' formating uses either the repr or str format of the C object:
In [3]: repr(C)
Out[3]: 'Matrix([\n[2, 3],\n[4, 5]])'
In [4]: str(C)
Out[4]: 'Matrix([[2, 3], [4, 5]])'
It's a python formatting operation that doesn't pay attention to sympy's display methods.
https://docs.sympy.org/latest/tutorial/printing.html documents sympy printing, though I don't off hand see ideas that will help you.
To display the whole thing as a sympy expression, the whole thing has to be rendered as whole; we can't forat each piece separately:
In [9]: display(C, 'x', C, '=', C*C)
⎡2 3⎤
⎢ ⎥
⎣4 5⎦
'x'
⎡2 3⎤
⎢ ⎥
⎣4 5⎦
'='
⎡16 21⎤
⎢ ⎥
⎣28 37⎦
===
As per comment:
In [11]: Eq(MatMul(C, C), C*C)
Out[11]:
⎡2 3⎤ ⎡2 3⎤ ⎡16 21⎤
⎢ ⎥⋅⎢ ⎥ = ⎢ ⎥
⎣4 5⎦ ⎣4 5⎦ ⎣28 37⎦