In
mathematics, a Fricke involution is the
involution of the
modular curve ''X''
0(''N'') given by τ → –1/''N''τ. It is named after
Robert Fricke. The Fricke involution also acts on other objects associated with the modular curve, such as spaces of
modular forms and the
Jacobian
In mathematics, a Jacobian, named for Carl Gustav Jacob Jacobi, may refer to:
*Jacobian matrix and determinant
*Jacobian elliptic functions
*Jacobian variety
*Intermediate Jacobian
In mathematics, the intermediate Jacobian of a compact Kähler m ...
''J''
0(''N'') of the modular curve.
See also
*
Atkin–Lehner involution
References
*
Modular forms
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