paramagpy.metal.Metal.fast_first_invariant_squared

static Metal.fast_first_invariant_squared(t)

Vectorised version of paramagpy.metal.Metal.first_invariant_squared()

This is generally used for speed in fitting PRE data

Parameters

tensorarray (array with shape (n,3,3)) – array of shielding tensors

Returns

firstInvariantSquared – the first invariants squared of the tensors

Return type

array with shape (n,1)