Models of the hyperbolic plane There are four models commonly used for hyperbolic geometry : the PERSON@1 model , the MISC@1 disc model , the MISC@1 half-plane model , and the PERSON@2 model , or hyperboloid model .

Models of the hyperbolic plane There are three models commonly used for hyperbolic geometry : the PERSON@1 model , the MISC@1 disc model , and the PERSON@2 model , or hyperboloid model .
