The inverse limits proposition of normal weakly θ-refinable spaces
Jin Cao
Abstract
Jin Cao
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.
Key concepts: Inverse, Mathematics, Paracompact space, Proposition, Pure mathematics, Combinatorics, Geometry, Hausdorff space