We correlate the notion of n-isoclinismof finite groups, introduced by J. C. Bioch in 1976,with the

relative n-th nilpotency degree, recently studied in literature. We characterize also all the pairs which are

isoclinic with (C,D8) via...

The purpose of this paper i s to give a relati on b etween the notion of the commutativity

degr ee of a fini te gr oup G (denoted by d(G)) and that o f i s o cl i n i s m b etween G and

an extr a s p eci al p ...

and will also generalize

them to relative n-isoclinism and relative n-th nilpotency degree, re-

spectively....