Functions

Argument (z)

Aliases: Arg arg

argument (angle) of complex number.

DirichletKernel (n,t)

Dirichlet kernel of order n.

DiscreteDelta (v)

Returns 1 iff all elements are zero.

ErrorFunction (x)

Aliases: erf

The error function, 2/sqrt(pi) * int_0^x e^(-t^2) dt.

See Planetmath for more information.

FejerKernel (n,t)

Fejer kernel of order n evaluated at t

See Planetmath for more information.

GammaFunction (x)

Aliases: Gamma

The Gamma function. Currently only implemented for real values.

See Planetmath for more information.

KroneckerDelta (v)

Returns 1 iff all elements are equal.

MinimizeFunction (func,x,incr)

Find the first value where f(x)=0.

MoebiusDiskMapping (a,z)

Moebius mapping of the disk to itself mapping a to 0.

See Planetmath for more information.

MoebiusMapping (z,z2,z3,z4)

Moebius mapping using the cross ratio taking z2,z3,z4 to 1,0, and infinity respectively.

See Planetmath for more information.

MoebiusMappingInftyToInfty (z,z2,z3)

Moebius mapping using the cross ratio taking infinity to infinity and z2,z3 to 1 and 0 respectively.

See Planetmath for more information.

MoebiusMappingInftyToOne (z,z3,z4)

Moebius mapping using the cross ratio taking infinity to 1 and z3,z4 to 0 and infinity respectively.

See Planetmath for more information.

MoebiusMappingInftyToZero (z,z2,z4)

Moebius mapping using the cross ratio taking infinity to 0 and z2,z4 to 1 and infinity respectively.

See Planetmath for more information.

PoissonKernel (r,sigma)

Poisson kernel on D(0,1) (not normalized to 1, that is integral of this is 2pi).

PoissonKernelRadius (r,sigma)

Poisson kernel on D(0,R) (not normalized to 1).

RiemannZeta (x)

Aliases: zeta

The Riemann zeta function. Currently only implemented for real values.

See Planetmath for more information.

UnitStep (x)

The unit step function is 0 for x<0, 1 otherwise. This is the integral of the Dirac Delta function. Also called the Heaviside function.

See Wikipedia for more information.

cis (x)

The cis function, that is the same as cos(x)+1i*sin(x)

deg2rad (x)

Convert degrees to radians.

rad2deg (x)

Convert radians to degrees.