Tychonoff Product on σ-Paralindel?f Spaces
  
Key Words: σ-para Lindel?f   strong Σ-space   P-space   P*-space   σ-locally finite base   orthobase C-scattered.  
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Author NameAffiliation
Zhu Peiyong Zigong Teachers′ College
Sichuan 643000 
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Abstract:
      In this paper, we mainly obtained following three theorems on σ-para Lindel?f spaces: (1) If X is a σ-paralindel?f P-space and Y is a σ-expandable strong Σ-space, then X×Y is σ-para Lindel?f space. (2) If X is a σ-paralindelf P*-space and Y has a σ-locally finite base, then X×Y is σ-para Lindel?f. (3) Let X and Y be σ-paralindel?f spaces with orthobase. If X is regular C scattered, then X×Y is σ-para-Lindel?f .
Citation:
DOI:10.3770/j.issn:1000-341X.1998.03.015
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