\nsimThe symbol \nsim is used to denote that two mathematical objects are not similar. It is the negation of the similarity relation, which is often used in geometry and algebra to indicate that two shapes, figures, or algebraic structures do not share the same form or properties.
The triangles ABC and DEF are not similar.
\triangle ABC \nsim \triangle DEFThe groups G and H are not similar.
G \nsim HThe matrices A and B are not similar.
A \nsim B