Thoracic
发表于 2025-3-21 18:39:57
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circumvent
发表于 2025-3-21 23:09:30
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仇恨
发表于 2025-3-22 00:49:43
Laura Hoffmann,Irene Moor,Matthias RichterA set . in a topological space . is said to be . if and only if any collection of open sets covering . (i.e., ∪G ⊃ .) has a finite subcollection also covering .
彩色
发表于 2025-3-22 06:58:58
Philipp E. Sischka,Georges SteffgenIf . and . are two topological spaces, a . from . to . is any law which assigns to each element of . a unique element of . The action of this law is represented by . = ., where . ∊ . ∊..
碎片
发表于 2025-3-22 10:02:01
Laura Hoffmann,Irene Moor,Matthias RichterA . in a set . is a nonnegative real-valued function defined for each pair of points . ∊ . and satisfying:
Generosity
发表于 2025-3-22 14:37:33
Laura Hoffmann,Irene Moor,Matthias RichterFor any set ., the .(.) is the l.u.b. (finite or infinite) of the aggregate of numbers [.(x, y)] for . ∊ ..
Generosity
发表于 2025-3-22 20:33:59
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六个才偏离
发表于 2025-3-22 23:36:07
Zur Bedeutung von Sprache im Fachunterricht. If . is any subset of a topological space ., then the . in . induced by the topology on . is that given by defining a set M’ to be open in . if and only if there exists an open set . in . such that .’ = . ∩ ..
贿赂
发表于 2025-3-23 05:10:32
Zur Bedeutung von Sprache im Fachunterricht.. For any set ., a representation ..∪ .. of . as the union of two nonempty disjoint sets, neither one containing a limit point of the other, is called a .. The sets .. and .. in a separation are called ..
dendrites
发表于 2025-3-23 05:43:55
Forschungsfrage und -hypothesenA compact connected set is called a ..