Hadamard's conjecture

Hadamard's conjecture

[′had·ə‚märdz kən′jek·chər]

(mathematics)

The conjecture that any partial differential equation that is essentially different from the wave equation fails to satisfy Huygens' principle.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.