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numlib::isquadres

Test for quadratic residues

Use only in the MuPAD Notebook Interface.

This functionality does not run in MATLAB.

Syntax

numlib::isquadres(a, m)

Description

If the integer number a is a quadratic residue modulo the natural number mnumlib::isquadres(a,m) returns TRUE, and if a is a quadratic non-residue modulo mnumlib::isquadres(a,m) returns FALSE.

If a and m are not coprime numlib::isquadres(a,m) returns an error.

numlib::isquadres returns an error if the arguments evaluate to numbers which are not both of the correct type.

numlib::isquadres returns the function call with its arguments evaluated if the arguments do not evaluate to numbers.

Examples

Example 1

132132 is a quadratic residue modulo 3231227:

numlib::isquadres(132132, 3231227)

Example 2

222222 is a quadratic non-residue modulo 324899:

numlib::isquadres(222222,324899)

Example 3

37 is a quadratic residue modulo 48884:

numlib::isquadres(37,48884)

Parameters

a

An integer

m

A natural number coprime to a

Return Values

numlib::isquadres returns TRUE, FALSE, or the function call with its arguments evaluated.

See Also

MuPAD Functions

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