Theta function (disambiguation)
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Theta functions are special functions of several complex variables. Theta function may also refer to:
- Q-theta function , a type of q-series
- Theta function of a lattice , a holomorphic function on the upper half-plane
- Mock theta functions , etc., a mock modular form of weight 1/2
- Ramanujan theta function
- Riemann–Siegel theta function
- Chebyshev function
- Feferman's function
- Heaviside step function sometimes denoted
- Lovász theta function, an upper bound on the Shannon capacity of a graph
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