math

  • full name: tenpy.tools.math

  • parent module: tenpy.tools

  • type: module

Functions

entropy(p[, n])

Calculate the entropy of a distribution.

gcd(a, b)

Computes the greatest common divisor (GCD) of two numbers.

gcd_array(a)

Return the greatest common divisor of all of entries in a

lcm(a, b)

Returns the least common multiple (LCM) of two positive numbers.

matvec_to_array(H)

transform an linear operator with a matvec method into a dense numpy array.

perm_sign(p)

Given a permutation p of numbers, returns its sign.

qr_li(A[, cutoff])

QR decomposition with cutoff to discard nearly linear dependent columns in Q.

rq_li(A[, cutoff])

RQ decomposition with cutoff to discard nearly linear dependent columns in Q.

speigs(A, k, *args, **kwargs)

Wrapper around scipy.sparse.linalg.eigs(), lifting the restriction k < rank(A)-1.

Module description

Different math functions needed at some point in the library.