https://doi.org/10.4169/amer.math.monthly.123.1.82 https://www.jstor.org/stable/10.4169/amer.math.monthly.123.1.82 In this paper a new graphical calculus for ...

This is a preview. Log in through your library . Abstract Problems with the notion of evenness, such as ambiguity, proliferation of indices, choice of indices, etc. can be overcome by a more ...