451 reputation
1516
bio website artscitech.blogspot.com
location Los Angeles, CA
age
visits member for 3 years, 1 month
seen 2 days ago

Engineer by education, and an avid learner of higher mathematics, albeit an amateur.


Mar
18
comment If a set is not $G_\delta$ in a metric space, is it also not $G_\delta$ is a larger metric space?
Yes, that's what I meant.
Mar
18
accepted If a set is not $G_\delta$ in a metric space, is it also not $G_\delta$ is a larger metric space?
Mar
18
comment If a set is not $G_\delta$ in a metric space, is it also not $G_\delta$ is a larger metric space?
Yes, of course! Sets open in $X$ stay open in $Y$. Thank you!
Mar
18
asked If a set is not $G_\delta$ in a metric space, is it also not $G_\delta$ is a larger metric space?
Mar
18
comment Prove inequality and when does equality hold?
Hint: Multiply it out.
Mar
17
accepted Proving that a set is not $G_\delta$
Mar
17
comment Proving that a set is not $G_\delta$
This is great, thanks very much! Is there a good you would recommend on the topic?
Mar
17
awarded  Excavator
Mar
17
asked Proving that a set is not $G_\delta$
Mar
17
revised How to show that the set of points of continuity is a $G_{\delta}$
Fixed rendering of text which was inside a mathematical expression.
Mar
17
suggested suggested edit on How to show that the set of points of continuity is a $G_{\delta}$
Mar
16
accepted Notation for “all integers less than $n$”
Mar
16
comment Notation for “all integers less than $n$”
I didn't know about the subscript notation, that's pretty neat. Thanks.
Mar
16
asked Notation for “all integers less than $n$”
Mar
3
awarded  Popular Question
Feb
9
awarded  Organizer
Feb
9
revised Third axiom of topology
This question is directly from a Coursera class on functional analysis currently running.
Feb
9
suggested suggested edit on Third axiom of topology
Feb
9
accepted Is inverse image of a point a set?
Feb
9
comment Is inverse image of a point a set?
That's exactly what I was looking for! Thanks!