bigintmat name = bigintmat_expression ; bigintmat name [ rows ] [ cols ] = bigintmat_expression ; bigintmat name [ rows ] [ cols ] = list_of_int_and_bigint expressions ; rows and cols must be positive int expressions.
Purpose:
defines a bigintmat variable.
Given a list of (big) integers, the matrix is filled
up with the first row from the left to the right, then the second
one and so on. If the (big-)int_list contains less than rows*cols
elements, the remaining ones are set to zero; if it contains
more elements, only the first rows*cols ones are considered.