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  • 0 posts edited
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  • 223 votes cast
Dec
20
accepted smooth vector field on the boundary of unit ball
Dec
17
comment smooth vector field on the boundary of unit ball
Can I ask how you tell it is pointing outwards? What does that dot product mean?
Dec
17
revised smooth vector field on the boundary of unit ball
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Dec
17
asked smooth vector field on the boundary of unit ball
Dec
2
awarded  Popular Question
Oct
2
awarded  Yearling
Mar
18
asked Cycliness of finite subgroup of the multiplicative group of a field
Mar
17
awarded  Notable Question
Mar
16
comment Why is $(3,1+\sqrt{-5})^2=(2-\sqrt{-5})$ in $\mathbb{Z}[\sqrt{-5}]$
Thanks for the higher viewpoint! Can I ask how you know $P$ is of index 3 in the ring of integers? The only relevant thing I know is the index of a principal ideal in the ring of integers is equal to the norm of the generator over $\mathbb{Q}$.
Mar
16
asked Tangent space of tangent vector
Mar
16
accepted Why is $(3,1+\sqrt{-5})^2=(2-\sqrt{-5})$ in $\mathbb{Z}[\sqrt{-5}]$
Mar
15
asked Why is $(3,1+\sqrt{-5})^2=(2-\sqrt{-5})$ in $\mathbb{Z}[\sqrt{-5}]$
Mar
14
comment Concrete example of zero section
Could you say something about my question on zero vector in tangent space?
Mar
14
asked Concrete example of zero section
Mar
14
accepted A “wrong” counterexample to splitting lemma in linear algebra
Mar
13
comment On the definition of critical point
But can I ask why such a definition is counter-intuitive considering the circle example I give in the question? Why is defining critical point this way beneficial in that case?
Mar
13
comment Definition of critical point
Could you take a look at my new question on critical point--math.stackexchange.com/questions/1188815/…
Mar
13
comment On the definition of critical point
@RobinGoodfellow Yes, I'm sure.
Mar
13
revised On the definition of critical point
added 123 characters in body
Mar
13
revised On the definition of critical point
added 16 characters in body