reducible transformation

reducible transformation

[ri¦düs·ə·bəl ‚tranz·fər′mā·shən]
(mathematics)
A linear transformation T on a vector space V that can be completely specified by describing its effect on two subspaces, M and N, that are each transformed into themselves by T and are such that any vector of V can be uniquely represented as the sum of a vector of M and a vector of N.