Hadamard's conjecture

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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.
References in periodicals archive ?
The design is focused on binary code, thus the biorthogonal Hadamard matrix (denoted by [sub.
As the most robust choice of code, biorthogonal Hadamard matrix has the maximum [d.