Cofactor
Encyclopedia
Cofactor may refer to any of the following:
- Cofactor (linear algebra)Cofactor (linear algebra)In linear algebra, the cofactor describes a particular construction that is useful for calculating both the determinant and inverse of square matrices...
, the signed minor of a matrix - Minor (linear algebra)Minor (linear algebra)In linear algebra, a minor of a matrix A is the determinant of some smaller square matrix, cut down from A by removing one or more of its rows or columns...
, an alternative name for the determinant of a smaller matrix than that which it describes - Cofactor (biochemistry)Cofactor (biochemistry)A cofactor is a non-protein chemical compound that is bound to a protein and is required for the protein's biological activity. These proteins are commonly enzymes, and cofactors can be considered "helper molecules" that assist in biochemical transformations....
, a substance that needs to be present in addition to an enzyme for a certain reaction to be catalysed - Shannon expansionShannon expansionIn mathematics, Shannon's expansion or the Shannon decomposition is a method by which a Boolean function can be represented by the sum of two sub-functions of the original. Although it is often credited to Claude Shannon, Boole proved this much earlier...
or Shannon cofactor, a derived function of another function, a notion useful in computer science and mathematics