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Results tagged with terminology
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user 1176
Questions of the kind "What's the name for a X that satisfies property Y?"
3
votes
1
answer
295
views
What to call substructures in universal algebra in which we restrict the signature?
Suppose $\Sigma$ is a signature in the sense of universal algebra and $\Sigma' \subseteq \Sigma$ a sub-signature. Every $\Sigma$-algebra is also a $\Sigma'$-algebra in a forgetful way. Suppose $A$ is …
- 48.8k
47
votes
7
answers
7k
views
What is an explicit bijection in combinatorics?
A standard way of demonstrating that two collections of combinatorial objects have the same cardinality is to exhibit a bijection between them. Browsing through some examples (here, there, yonder) qui …
- 48.8k