Cat
::Matrix
Category of matrices
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Cat::Matrix(R
)
Cat::Matrix(R)
represents the category of
matrices over the rng R
.
A Cat::Matrix(R)
is a matrix of arbitrary
dimension over a component ring R
.
In the following description of the methods, we use the following
notations for a matrix A from
a domain of category Cat::Matrix(R)
:
nrows(A) denotes the number of rows and ncols(A) the number of columns of A.
Further on, a row index is an integer ranges from 1 to nrows(A), and a column index is an integer ranges from 1 to ncols(A).

A domain which must be from the category 
"coeffRing"  is set to 