cdn_PaleyIIprimepower {HadamardR}

cdn_PaleyIIprimepower checks Hadamard Matrix can be constructed using Paley II method.

Description

cdn_PaleyIIprimepower checks Hadamard Matrix can be constructed using Paley II method.

Usage

cdn_PaleyIIprimepower(order)

Arguments

order

integer

Details

In Paley II method, q=order/2-1 and q is prime power and q=1 (mod 4) then it retuns 15 otherwise NULL.

Value

15 or NULL

References

Paley, R.E.A.C. (1933). On Orthogonal matrices. J. Combin. Theory, A 57(1), 86-108.

See Also

PaleyIIPrimePower for Paley construction method.

Examples

cdn_PaleyIIprimepower(340)
#15
cdn_PaleyIIprimepower(64)
#NULL