Symbolic Functions

The following symbolic functions can only be evaluated using the symbolic equal sign or the Symbolics menu. They cannot be evaluated using the equal sign for evaluation (=).

Note: To return numerical results for these functions, use the keyword float.

Ci(x) and Chi(x) - Cosine and hyperbolic cosine integrals.

denom - Returns the denominator of a fraction or rational expression.

dilog(x) - Dilogarithm function.

Δ(x) - Dirac Delta (unit impulse) function.

Ei(x) - Exponential integral (Cauchy principal value) or Ei(n,x).

FresnelC(x) and FresnelS(x) - Fresnel cosine and sine integrals.

LambertW(x) and LambertW(n,x) - Lambert's W function. LambertW(n,x) is the nth branch of the function. Note that LambertW(0,x) = LambertW(x).

numer - Returns the numerator of a fraction or rational expression.

Psi(n,x) and Psi(x) - Polygamma and digamma functions. Note that Psi(0,x) = Psi(x).

Si(x) and Shi(x) - Sine and hyperbolic sine integrals.

Zeta(s) - Riemann Zeta function.

See the following QuickSheets for definitions and examples.

QuickSheet - Special Symbolic Functions
QuickSheet - Special Symbolic Integral Functions
New Features - New Symbolic Operations

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