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Vivaan Daga

 Mathematics

Associated with Math.SE; for both general discussion & math qu...
6
Vivaan Daga
Jun 19 13:58
Alright then. Thanks for your time. (I was under the impression closure always leads to deletion unless the question has hundereds of upvotes like the batman question, but I see I was wrong)
Vivaan Daga
Jun 19 13:56
As I said earlier, I dont really care about it being closed, I was just worried about it being auto-deleted by a bot since it was closed as not containing math...
Vivaan Daga
Jun 19 13:54
Well, when questions get closed the next step is deletion. I don't want the question and the good answer to get deleted.
Vivaan Daga
Jun 19 13:53
My question was a couple of years old.
Vivaan Daga
Jun 19 13:52
(I'm just saying that rules should exist uniformly...)
Vivaan Daga
Jun 19 13:51
Like the most popular unanswered question in topology math.stackexchange.com/questions/952466/… was also cross posted but is not closed....
Vivaan Daga
Jun 19 13:49
Not really, I am a little more upset about the fact that they seem to be randomly enforced rather than uniformly enforced if you get what I mean...
Vivaan Daga
Jun 19 13:47
When I cross-posted i was just following other users on this site... (there are several hundered). I did not know about that.
Vivaan Daga
Jun 19 13:46
Both answers I recieved on MO and MSE are somewhat distinct actaully. So I see no reason why the question should not exist on both sites...
Vivaan Daga
Jun 19 13:44
I had no clue if it was suitable for MO... It was clearly(in my mind) suitable for MSE...
Vivaan Daga
Jun 19 13:43
I had already posted it to MO
Vivaan Daga
Jun 19 13:43
It is not... the answer I got on MSE came after...
Vivaan Daga
Jun 19 13:42
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Q: Why do we need "canonical" well-orders?

Vivaan Daga(I asked this question on MO, https://mathoverflow.net/questions/443117/why-do-we-need-canonical-well-orders) Von-Neumann ordinals can be thought of "canonical" well-orders, Indeed every well-order $W$ has a unique ordinal that is its "order type". This raises the question of why a canonical orde...

soft-question set-theory cardinals ordinals well-orders
Vivaan Daga
Jun 19 13:40
Hm. My question was by no means a research question. It was more of a general knowledge question...
Vivaan Daga
Jun 19 13:38
How can a (mathematical) question be in scope for MO but out of scope for MSE
Vivaan Daga
Jun 19 13:37
In fact, the close reason given in the banner makes no sense: "this question is not about mathematics..."
Vivaan Daga
Jun 19 13:36
It was closed solely because it was also asked on MO.
Vivaan Daga
Jun 19 13:35
@Jakobian The question was suitable for both MSE and MO.
Vivaan Daga
Jun 19 13:35
I see. There are a lot of questions like that. One with a few thousand upvotes. I don't mind them getting closed but they should not be deleted if the cross post is with MO and they are well received on both sites.
Vivaan Daga
Jun 19 13:32
Today a MOD (unilaterally) closed one of my questions citing that as a reason.
Vivaan Daga
Jun 19 13:30
Is there a policy to close well received questions on MSE cause they were cross posted to MO? Maybe @XanderHenderson can chip in? Sorry I have been away from MSE for a while.
Vivaan Daga
Jun 16, 2024 18:58
That’s not in the question
Vivaan Daga
Jun 16, 2024 18:58
No…
Vivaan Daga
Jun 16, 2024 18:56
Perhaps you misread my question or have a different def of well defined?
Vivaan Daga
Jun 16, 2024 18:55
@SoumikMukherjee The operation certainly gives us a binary function
Vivaan Daga
Jun 16, 2024 18:45
No. The binary operation gives a well defined function always. My question is if this operation forms a group then must H be normal?
Vivaan Daga
Jun 16, 2024 18:42
It’s slightly confusing but I think the above captures what I am saying perfectly @SoumikMukherjee
Vivaan Daga
Jun 16, 2024 18:41
We are picking a representative for each coset(say using the axiom of choice) and then defining the product to be the coset in which the product of the representative lies. It seems like a perfectly well defined binary operation.
Vivaan Daga
Jun 16, 2024 18:08
@SoumikMukherjee proof of the hard direction?
Vivaan Daga
Jun 16, 2024 18:07
I realise that this is not a great def but am curious about the above Q
Vivaan Daga
Jun 16, 2024 18:06
@Jakobian so does this definition lead to a group if and only if H is normal. Assuming H is normal then it’s easy to see this def leads to a group but does the converse hold?
Vivaan Daga
Jun 16, 2024 18:02
@Jakobian why doesn’t h try e operation make sense. We are picking a representative for each coset(say using the axiom of choice) and then defining the product to be the coset in which the product of the representative lies. It seems like a perfectly well defined binary operation?
Vivaan Daga
Jun 16, 2024 17:47
@Jakobian If take a group G, subgroup H and define an operation on the set of cosets G/H by picking a representative for each coset and defining the product of two cosets to be the coset containing the product of the representatives then do we get a group if and only if H is normal in G?
Vivaan Daga
Jun 10, 2024 15:30
What is the degree of the field Q(a^1/q) where q is prime and a is an integer?
Vivaan Daga
Apr 10, 2024 15:37
for k,m>2
Vivaan Daga
Apr 10, 2024 15:34
can k(9k^2+2)+m(9m^2+2) be of the form 2^r for positive k,m,r?
Vivaan Daga
Apr 9, 2024 18:59
How does one show that r^3+(r+1)^3+(r+2)^3+m^3+(m+1)^3+(m+2)^3 is never equal to 9*2^k ?Where r,m,k are positive integers.
Vivaan Daga
Mar 31, 2024 16:57
any ideas for my question @robjohn/
Vivaan Daga
Mar 31, 2024 16:38
it is so intutive yet difficult to prove rigorously
Vivaan Daga
Mar 31, 2024 16:18
@jakobian does my question well defined and sensible?
Vivaan Daga
Mar 31, 2024 15:02
How does one show that the ratio of the area of a square to that of the area of its image approaches the jacobian determinant as the square becomes smaller and smaller? Of course, we assume it that the function is differentiable everywhere…
Intuitively it is very clear but how to make it rigourous @Jakobian any ideas for this question of mine?
Vivaan Daga
Mar 31, 2024 06:15
Intuitively it is very clear but how to make it rigourous
Vivaan Daga
Mar 31, 2024 06:14
How does one show that the ratio of the area of a square to that of the area of its image approaches the jacobian determinant as the square becomes smaller and smaller? Of course, we assume it that the function is differentiable everywhere…
Vivaan Daga
Mar 20, 2024 17:58
1,3,4,4,4,4,4 and S4 I mean
Vivaan Daga
Mar 20, 2024 17:57
@Thorgott even my specific case is hard without a computer?
Vivaan Daga
Mar 20, 2024 17:23
If true it would make the proof of the Sylow theorems infinitely less mysterious
Vivaan Daga
Mar 20, 2024 17:23
Any ideas for my Question I am extremely curious
Vivaan Daga
Mar 20, 2024 14:41
in general given orbit lengths is constructing an action easy? @Thorgott '
Vivaan Daga
Mar 20, 2024 14:34
is a computer search the best possible solution?
Vivaan Daga
Mar 20, 2024 14:33
where the orbits have length 1,3,4,4,4,4,4 and S4 is acting on itslef