Diamond operator explained

In number theory, the diamond operatorsd〉 are operators acting on the space of modular forms for the group Γ1(N), given by the action of a matrix in Γ0(N) where δ ≈ d mod N. The diamond operators form an abelian group and commute with the Hecke operators.

Unicode

In Unicode, the diamond operator is represented by the character .[1]

Notes and References

  1. Web site: Mathematical Operators – Unicode. 2013-04-22.