Use of Eq

[amsympy]

Hi

I write the following code to display a matrix named P equal to A.T*A.

---------------------------------------------
from sympy import *
a, b, c, d = symbols('a, b, c, d')
P = Symbol('P')

A = Matrix( [ [a, b], [c, d] ])
M = A.T*A
Eq(P, M)

----------------------------------------------

but sympy display

False instead the expected result.

Thanks

[Aaron Meurer]

You need for P to be a MatrixSymbol, like

P = MatrixSymbol('P', 2, 2)

A regular Symbol object is assumed to be a scalar, which is why SymPy
states it cannot be equal to a matrix.

Aaron Meurer

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[amsympy]

Fine
Thanks