pyFM.optimize.base_functions.descr_preservation_grad

pyFM.optimize.base_functions.descr_preservation_grad(C, descr1_red, descr2_red)

Compute the gradient of the descriptor preservation constraint.

Parameters:

  • C ((K2, K1) np.ndarray) – Functional map.

  • descr1_red ((K1, p) np.ndarray) – Descriptors on the first basis.

  • descr2_red ((K2, p) np.ndarray) – Descriptors on the second basis.

Returns:

gradient – Gradient of the descriptor preservation squared norm.

Return type:

(K2, K1) np.ndarray