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729
bio website math.stackexchange.com/users/…
location Antarctica
age 79
visits member for 2 years
seen Oct 16 at 9:51

Self-learning mathematics. Many thanks to those who make time to help others on the site.


Oct
15
comment Clarification for proof of $\mathbb{Q}$ being dense in $\mathbb{R}$ (Rudin's PMA)
@ThomasAndrews And if it is the $nx$ obtained from $n(y-x)>1$, how does one know to focus on $nx$ and not $ny$?
Oct
14
comment Clarification for proof of $\mathbb{Q}$ being dense in $\mathbb{R}$ (Rudin's PMA)
@ThomasAndrews When you first mention $nx$, are you referring to the $nx$ obtained from $n(y-x)>1$?
Oct
14
comment Baby Rudin Theorem 1.20 (b) Proof
@BrianM.Scott Why doesn't the set begin with "-m_2"?
Oct
7
awarded  Popular Question
Oct
6
awarded  Yearling
Sep
30
awarded  Explainer
Aug
30
awarded  Popular Question
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25
awarded  Popular Question
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
May
25
awarded  Popular Question
Mar
9
awarded  Popular Question
Feb
6
awarded  Nice Question
Nov
25
awarded  Popular Question
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21
awarded  Popular Question
Oct
6
awarded  Yearling
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awarded  Civic Duty
Jun
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awarded  Taxonomist
Jun
26
accepted Showing path connected matrices of a group $G$ is a normal subgroup
Jun
26
comment Showing path connected matrices of a group $G$ is a normal subgroup
In the first part, to allow for the inverse of $B$, do I need $\tau^{-1}$ to be continuous too or is it enough to say $\tau$ is continuous? Is this equivalent to saying if $B\in H$, we want to show $B^{-1}$ is in $H$? And you don't need to edit the post just to fix $I$, it's clear now.