@Peter,

Group theory is part of algebra. How it comes under Discrete Mathematics?

Hello Esakki,

 I repeat the inquiry by peter : what does "come under" mean for you?

One cannot say that group theory is part of discrete mathematics.

Gabriel

@ Gabriel,

 I edited my question.

In pure mathematical terms an algebraic structure is an ordered tuple (S,o1,o2,o3...,on) where S is a set which has one or more binary operations on SxS. A group is a common example of a algebraic structure. Other familiar example is a vector space.