This operation on matrices is non-commutative and requires that the number of columns in the first matrix equals the number of rows in the second.
The Toom-Cook and Karatsuba algorithms do this operation. In a field, all but one of the elements have an inverse for this operation. A capital pi is used to denote repeatedly doing this over an index. This operation on matrices is non-commutative and requires that the number of columns in the first matrix equals the number of rows in the second. Repeatedly doing this is called exponentiation. For 10 points, name this operation that when applied to two and three yields six.
The Toom-Cook and Karatsuba algorithms do this operation. In a field, all but one of the elements have an inverse for this operation.
{multiplication} [or {product}; accept word forms like {multiply}]