open simplex

open simplex

[′ō·pən ′sim‚pleks]
(mathematics)
A modification of a simplex with vertices po, p1, …, pn , in which the points of the simplex, a0 p0+ a1 p1+ ⋯ + an pn , are restricted by the condition that each of the coefficients ai must be greater than 0.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.