Diamond operator

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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 (a b
c d
) in Γ0(N). The diamond operators form an abelian group and commute with the Hecke operators.


In Unicode, the diamond operator is represented by the character U+22C4 DIAMOND OPERATOR. [1]


  1. ^ "Mathematical Operators – Unicode" (PDF). Retrieved 2013-04-22.