scipy.linalg.
coshm#
- scipy.linalg.coshm(A)[source]#
- Compute the hyperbolic matrix cosine. - This routine uses expm to compute the matrix exponentials. - Parameters:
- A(N, N) array_like
- Input array. 
 
- Returns:
- coshm(N, N) ndarray
- Hyperbolic matrix cosine of A 
 
 - Examples - >>> import numpy as np >>> from scipy.linalg import tanhm, sinhm, coshm >>> a = np.array([[1.0, 3.0], [1.0, 4.0]]) >>> c = coshm(a) >>> c array([[ 11.24592233, 38.76236492], [ 12.92078831, 50.00828725]]) - Verify tanhm(a) = sinhm(a).dot(inv(coshm(a))) - >>> t = tanhm(a) >>> s = sinhm(a) >>> t - s.dot(np.linalg.inv(c)) array([[ 2.72004641e-15, 4.55191440e-15], [ 0.00000000e+00, -5.55111512e-16]])