An integer which is expressible in only one way in the form 
or 
where 
is relatively prime
to 
. If the integer
is expressible in more than one way, it is called a polymorph.
Monomorph
See also
Antimorph, Idoneal Number, Monomorphism, Pell Equation, PolymorphExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Monomorph." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Monomorph.html