[GiNaC-list] Tricky way to control over dummy indices

esarcush esarcush esarcush at gmail.com
Fri Jul 14 20:24:35 CEST 2017

Dear all,

in expression

indexed(A, i, j) * indexed(B, j, k)

GiNaC is saying that the dummy index is "j" and "i, k" are free. Is
there a way to determine dummy indices based on Einstein summation
notation; namely all the indices in the latter be free.

All the bests,

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