TensorContract
Disponible
Contract tensor indices
TensorContract[tensor, {{s11, s12}, {s21, s22}, …}]
A = Array[Subscript[a, ##]&, {2, 3, 2, 3}]; TensorContract[A, {{1, 3}, {2, 4}}]
→ Subscript[a, 1, 1, 1, 1] + Subscript[a, 1, 2, 1, 2] + Subscript[a, 1, 3, 1, 3] + Subscript[a, 2, 1, 2, 1] + Subscript[a, 2, 2, 2, 2] + Subscript[a, 2, 3, 2, 3] Les 6300 fonctions ·
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