Box Topology LetX a beatopologicalspaceforeacha? A . 1.In ? X a , thesetsoftheform ? U a , where U a isopeninX a foreacha? A , formabase foratopology. 2.Whatdonhoods f? R R looklikeintheboxtopology?...

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BoxTopology


LetXabeatopologicalspaceforeacha?A
.


1.In ? Xa
,thesetsoftheform ? Ua
,where UaisopeninXa
foreacha?A
,formabase


foratopology.


2.Whatdonhoods f?
RR
looklikeintheboxtopology? [see8.4(1)].Comparewith


4F3.




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Reference 1 Reference 2 Reference 2 Reference 3 Solution for 4F.3





Answered Same DayDec 21, 2021

Answer To: Box Topology LetX a beatopologicalspaceforeacha? A . 1.In ? X a , thesetsoftheform ? U a , where U a...

David answered on Dec 21 2021
121 Votes
1. Let B = {

Uα|Uα open inXα}. We have to prove that this collection
makes the basis for the bo
x topology. For this we have to verify the
following:
(a) As in the collection, we have

Xα ∈ B, Hence B covers

Xα.
(b) Let
{xα} ∈ (

Uα) ∩ (

Vα),
Then we have {xα} ∈

Uα and {xα}...
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