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.