Symmetries of 3ph vertex #153
Description
V(1, 2, 3) is invariant under permutation of the arguments. Also V(-1, -2, -3) = V(1, 2, 3)*. Need to implement these.
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V(1, 2, 3) is invariant under permutation of the arguments. Also V(-1, -2, -3) = V(1, 2, 3)*. Need to implement these.