Tag for questions about using optional arguments in Mathematica functions.

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0
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1answer
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How to make an index optional?

Can I define a relation between variables, such that the expression will also be evaluated (then assuming all indices are equal) when no index is given? $$ x_i + y_j = \delta_{ij} ...
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0answers
89 views

Unexpected pattern matching behaviour: PatternSequence vs. Optional

Consider the following pattern-matching expressions: ...