In number theory, a cusp form is a particular kind of modular form with zero constant coefficient in its Fourier series expansion. == Introduction == A cusp form is distinguished in the case of modular forms for the modular group by the vanishing of the constant coefficient a0 in the Fourier series expansion (see q-expansion) ∑ a n q n .
In number theory, a cusp form is a particular kind of modular form with zero constant coefficient in its Fourier series expansion. == Introduction == A cusp form is distinguished in the case of modular forms for the modular group by the vanishing of the constant coefficient a0 in the Fourier series expansion (see q-expansion) ∑ a n q n .
Source: Wikipedia "Cusp form" · CC BY-SA 4.0
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