acosm - matrix wise cosine inverse

Calling Sequence

t=acosm(x)

Parameters

• x : real or complex square matrix
• t : real or complex square matrix

Description

t are cosine inverse of the x matrix. Diagonalization method is used. For nonsymmetric matrices result may be inaccurate.One has t=-%i*logm(x+%i*sqrtm(eye()-x*x))

Examples

A=[1,2;3,4];
cosm(acosm(A))
 

See Also

acos  sqrtm  logm