Linear groups are important in the field of mathematics.

The unitary groups are important in quantum mechanics.

Orthogonal groups are important in linear algebra.

There are many e-groups dedicated to various topics.

Symplectic groups are important in the study of mathematical physics.

There are different income groups in society.

Algebraic groups are an important topic in mathematics.

Profinite groups are an important topic in algebra.

The year-groups at the school range from kindergarten to twelfth grade.

The automorphism groups of the graph are isomorphic.