fixed set
plural of aulorhynchid
Relating to costameres.
In a plaguy way.
(mathematics) A set which is unchanged by a function or other mapping. Formally: a set, S, is a fixed set of a function, f, if and only if for all x in S, f(x)=x.
その数学者は、関数fによって各点が変わらない不変集合を特定した。
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