pyFM.optimize.base_functions.descr_preservation_and_grad

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

Compute the descriptor preservation constraint and its gradient.

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:

  • energy (float) – Descriptor preservation squared norm.

  • gradient ((K2, K1) np.ndarray) – Gradient of the descriptor preservation squared norm.