2001Journal of Guangxi UniversityRequires access

The inverse limits proposition of normal weakly θ-refinable spaces

Jin Cao

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Abstract

This paper proves the following results:Let X= lim ←{X σ,π σ ρ,∧},|∧|=λ,and every π σ be open and onto mapping,(1) if X is λparacompact and every X σ is normal and weakly θrefinable,then X is normal and weakly θrefinable;(2) if X is hereditarily λ paracompact and every X σ is hereditarily normal and hereditarily weakly θrefinable,then X is hereditarily normal and hereditarily weakly θrefinable.

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This paper proves the following results:Let X= lim ←{X σ,π σ ρ,∧},|∧|=λ,and every π σ be open and onto mapping,(1) if X is λparacompact and every X σ is normal and weakly θrefinable,then X is normal and weakly θrefinable;(2) if X is hereditarily λ paracompact and every X σ is hereditarily normal and hereditarily weakly θrefinable,then X is hereditarily normal and hereditarily weakly θrefinable.

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Available abstract

This paper proves the following results:Let X= lim ←{X σ,π σ ρ,∧},|∧|=λ,and every π σ be open and onto mapping,(1) if X is λparacompact and every X σ is normal and weakly θrefinable,then X is normal and weakly θrefinable;(2) if X is hereditarily λ paracompact and every X σ is hereditarily normal and hereditarily weakly θrefinable,then X is hereditarily normal and hereditarily weakly θrefinable.

Key concepts: Inverse, Mathematics, Paracompact space, Proposition, Pure mathematics, Combinatorics, Geometry, Hausdorff space

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