A property is a which remains intact under homeomorphism. We Let Let need to show 'Lindelof' topological property. f: x→Y Note that f: x→Y f-¹: y →x topological property Let By = {Vitie I of Yo be we are given with We shall Lindelof. both are Show be a Then Bo{ fi (U₁) Ying is Cover of homeo is a Continuous morphism. x Lindelof an an open Cover ~ (Y)=X. be open x is or, say Then, Lindelof, By has finite. infinite subcover countably By = { $* (U3) } je 1/ fr f.e Неп се, again infinite an x c f(x)=Y note that Y ус By = { Uj}se I' is an open sub cover of Y which is finite or countable By is so, U f (U5) SEI' =) Lindelof is UU; SEI' is Lindelof. U f(f(u) JEI' a topological property.
A property is a which remains intact under homeomorphism. We Let Let need to show 'Lindelof' topological property. f: x→Y Note that f: x→Y f-¹: y →x topological property Let By = {Vitie I of Yo be we are given with We shall Lindelof. both are Show be a Then Bo{ fi (U₁) Ying is Cover of homeo is a Continuous morphism. x Lindelof an an open Cover ~ (Y)=X. be open x is or, say Then, Lindelof, By has finite. infinite subcover countably By = { $* (U3) } je 1/ fr f.e Неп се, again infinite an x c f(x)=Y note that Y ус By = { Uj}se I' is an open sub cover of Y which is finite or countable By is so, U f (U5) SEI' =) Lindelof is UU; SEI' is Lindelof. U f(f(u) JEI' a topological property.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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