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SelfNonCommuting
Make tensor components non-commuting.
Used to make objects with indices non-commuting when their index
values are different. See SelfAntiCommuting for more
information.A_{m}::SelfNonCommuting.
ex:= A_{n} A_{a} A_{m};
sort_product(_);
\(\displaystyle{}A_{n} A_{a} A_{m}\)
\(\displaystyle{}A_{n} A_{a} A_{m}\)