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Questions asking for the intuition behind some definition, conjecture, proof etc. In other words, questions designed to improve or to acquire understanding on a conceptual or intuitive level, as opposed to on a technical or formal level. When asking such a question it can be helpful to include a rough description of ones understanding of the subject at hand (on a technical level).

2 votes

Generalization of join of simplicial complexes

Well, the deleted join has been studied. Somewhat informally, that's where you take the join of a simplicial complex $\Delta$ with itself, then delete the faces $\sigma_1 \cup \sigma_2$ in $\Delta * …
Russ Woodroofe's user avatar