fold_s4_to_s8

fold_s4_to_s8(eri, *, validate=True)

Folds a 2-dimensional tensor to 8-fold symmetries (1-dimensional).

Parameters:

• eri (Tensor | ARRAY_TYPE) – the 2-dimensional tensor to fold.

• validate (bool) – when set to False, the requirements of eri are not validated.

Returns:

An 8-fold symmetric tensor.

Raises:

• ValueError – if eri is not 2-dimensional.

• ValueError – if eri is not a symmetric tensor.

Return type:

S8Integrals