Skew-symmetric Matrix

In mathematics, particularly in linear algebra,
a skew-symmetric matrix(also known as an antisymmetric or antimetric) is a square matrix **A** whose transpose
is also its negative.
This means it satisfies the equation
A = −A^{T}.
If the entry in the i-th row and j-th column is a_{ij}, i.e.
A = (a_{ij})
then the symmetric condition becomes
a_{ij} = −a_{ji}.

You should determine whether the specified square matrix is skew-symmetric or not.

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