GERM
发表于 2025-3-21 19:07:25
书目名称General Topology II影响因子(影响力)<br> http://figure.impactfactor.cn/if/?ISSN=BK0382144<br><br> <br><br>书目名称General Topology II影响因子(影响力)学科排名<br> http://figure.impactfactor.cn/ifr/?ISSN=BK0382144<br><br> <br><br>书目名称General Topology II网络公开度<br> http://figure.impactfactor.cn/at/?ISSN=BK0382144<br><br> <br><br>书目名称General Topology II网络公开度学科排名<br> http://figure.impactfactor.cn/atr/?ISSN=BK0382144<br><br> <br><br>书目名称General Topology II被引频次<br> http://figure.impactfactor.cn/tc/?ISSN=BK0382144<br><br> <br><br>书目名称General Topology II被引频次学科排名<br> http://figure.impactfactor.cn/tcr/?ISSN=BK0382144<br><br> <br><br>书目名称General Topology II年度引用<br> http://figure.impactfactor.cn/ii/?ISSN=BK0382144<br><br> <br><br>书目名称General Topology II年度引用学科排名<br> http://figure.impactfactor.cn/iir/?ISSN=BK0382144<br><br> <br><br>书目名称General Topology II读者反馈<br> http://figure.impactfactor.cn/5y/?ISSN=BK0382144<br><br> <br><br>书目名称General Topology II读者反馈学科排名<br> http://figure.impactfactor.cn/5yr/?ISSN=BK0382144<br><br> <br><br>
Bombast
发表于 2025-3-21 23:52:07
Compact Extensions,sets of . are open in . ∪{ξ}. Let us assume that . ≠ Ø. The compact space . ∪ {ξ} containing . as a dense open subspace has one essential deficiency. It does not even satisfy the . separation axiom since none of the sets {.}, where . ∈ ., is closed in . ∪ {ξ}.
triptans
发表于 2025-3-22 04:16:50
Book 1996tness appeared in mathematics for the first time as one of the main topo logical properties of an interval, a square, a sphere and any closed, bounded subset of a finite dimensional Euclidean space. Once it was realized that pre cisely this property was responsible for a series of fundamental fact
喊叫
发表于 2025-3-22 06:46:48
Compactness and Products,strictions on the cardinality of the family of factors and their separation properties, while other properties of compactness type can be destroyed already by the operation of the product of two spaces or even by the operation of topological squaring.
Cubicle
发表于 2025-3-22 10:20:41
http://reply.papertrans.cn/39/3822/382144/382144_5.png
佛刊
发表于 2025-3-22 16:17:51
http://reply.papertrans.cn/39/3822/382144/382144_6.png
佛刊
发表于 2025-3-22 18:51:29
http://reply.papertrans.cn/39/3822/382144/382144_7.png
的阐明
发表于 2025-3-22 21:22:42
Lubica Benuskova,Nikola KasabovA space . is called . if every open cover of . contains a finite subcover. A compact Hausdorff space will be called a .. We shall see that the Hausdorff separation axiom has a great impact on the properties of compact spaces.
埋葬
发表于 2025-3-23 01:40:05
http://reply.papertrans.cn/39/3822/382144/382144_9.png
Coma704
发表于 2025-3-23 05:49:40
Computational Nuclear Physics 2A . is a function defined on the class of all topological spaces or on any of its subclasses whose values are infinite cardinal numbers and has the property that for homeomorphic spaces the function assumes the same value. In general topology the theme of cardinal invariants plays a crucial role. We will provide some reasons why this is the case.