acoshm - matrix hyperbolic inverse cosine

Calling Sequence

t=acoshm(x)

Parameters

• x,t : real or complex square matrix

Description

acoshm is the matrix hyperbolic inverse cosine of the matrix x. Uses the formula t=logm(x+(x+eye())*sqrtm((x-eye())/(x+eye()))) For non symmetric matrices result may be inaccurate.

Examples

A=[1,2;3,4];
coshm(acoshm(A))
A(1,1)=A(1,1)+%i;
coshm(acoshm(A))
 

See Also

acosh  logm  sqrtm