Difference between revisions of "Klein invariant J"

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The Klein j-invariant $j(\tau)$ is ''the'' modular function which encodes arithmetic information about the singular moduli of imaginary quadratic fields.
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The Klein j-invariant $j(\tau)$ is ''the'' [[modular function]] which encodes arithmetic information about the [[singular moduli]] of [[imaginary quadratic fields]].
It is invariant under the full modular group $\mathbf{SL}(2,\mathbb{Z})$
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It is invariant under the [[full modular group]] $\mathbf{SL}(2,\mathbb{Z})$

Revision as of 14:42, 9 October 2014

The Klein j-invariant $j(\tau)$ is the modular function which encodes arithmetic information about the singular moduli of imaginary quadratic fields. It is invariant under the full modular group $\mathbf{SL}(2,\mathbb{Z})$