Theta function (disambiguation)

In mathematics, the term theta function is used in several ways:

• The Jacobian theta functions of several complex variables play an important role in the theory of elliptic functions
• The mock theta function
• The Ramanujan's theta function
• The Riemann-Siegel theta function
• Often the Heaviside function is also called the theta function
• The first Chebyshev function is also designated by the Greek letter theta

This is a disambiguation page for differentiating between several terms identified with the same word.