closed linear transformation

closed linear transformation

[¦klōzd ¦lin·ē·ər ‚tranz·fər′mā·shən]
(mathematics)
A linear transformation T such that the set of points of the form [x, T (x)] is closed in the Cartesian product D̄ × R̄ of the closure of the domain D and the closure of the range R of T.