cdn_PaleyIprimepower {HadamardR}

cdn_PaleyIprimepower checks Hadamard Matrix can be constructed using Paley I method.

Description

cdn_PaleyIprimepower checks Hadamard Matrix can be constructed using Paley I method.

Usage

cdn_PaleyIprimepower(order)

Arguments

order

integer

Details

In Paley I method, If q=order-1 and q is prime power and q=3 (mod 4) then it retuns 14 otherwise NULL.

Value

14 or NULL

References

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

See Also

PaleyIPrimePower for Paley I construction method.

Examples

cdn_PaleyI(28)
#14
cdn_PaleyI(16)
#NULL