No, since the noise to signal ratio is going to be terrible. You have a much better chance on a site whose users are all experts and which gets less traffic.
A rule of thumb is that if you're not sure, post here. Worst case scenario, you can always go on meta.MO and ask if that question is suitable, or something like that. A slightly more specific rule of ...
How can I choose the preferred website to put my questions?
I once read something along the lines "If you have to ask whether to ask on MO or math.se, likely you should ask it on math.se." I think this is a good rule of thumb.
What if someone writes his or her question down on the not preferable website?
If you post on MO and they think it is ...
Sometimes you want to have pizza for dinner. And that's fine. You call the local pizza place, and you order pizza which is delivered to your house usually within 30 minutes.
What you don't do is neither call several pizza places and see which one gets first to your place; or call a falafel place, and order a large pizza with extra mushrooms.
When do you ...
I think you should err on the side of just asking on MathOverflow. There aren't enough interesting questions on MO these days anyway. If you're worried about your reputation (in the colloquial sense) post under a pseudonym.
Short answer : no.
(By the way, it has never been "okay" to simultaneously cross-post questions on MSE and MO. We've been requesting users to stick with one site and wait for a reasonable amount of time before trying to ask on the other site.)
Longer answer: As of today, a question that you may want to move between the two fora now can be properly ...
As far as I'm aware, the set of things that are on-topic at MO is a proper subset of the set of things that are on topic here.
For this reason I think questions should not be migrated to MO at all -- a question that MO would accept is one we should not reject in the first place. An exception to this can be made if the asker changes his mind and explicitly ...
Disclaimer: I am a MathOverflow moderator. I haven't had time to carefully read through all the opinions in this lengthy debate, but I thought it would be useful to add my perspective.
First, and I don't think anyone is denying this, there are valid reasons to migrate some questions from MSE to MO. Whether and when to do this is the question, and this is ...
I think the best thing to do would be to post a CW answer containing a quotebox with the MO solution while providing both a link to the MO thread and citing who gave the solution.
This way, the question will remain on MSE marked as solved, dissuading future duplicates.
It is better to quote the text while crediting the author than only ...
I feel that the best path is to mimic comment answers:
Notify, if possible, to the MO answerer about the MSE copy; or post a CW answer with a link to the MO answer and a short notice saying that the answer was given (and accepted, if applicable) on mathoverflow.
What I am suggesting is basically an elaboration of Asaf's answer, designed to clarify a few things--especially about when questions should not be migrated, except--possibly--at the explicit request of the OP.
A question that is receiving good answers on MSE should not be migrated. In particular, questions should not be migrated because the MO crowd wants ...
My opinion is that questions should only be marked as duplicate only if they are on the same site. For example, if the same question is asked on the site for professional linguists and on the site for English language learners, it requires different answers and different level of detail. Perhaps the difference between MO and MSE is not that big, but there ...
Since June 25, 2013. See: MathOverflow 2.0, History of MathOverflow. Generally, meta.MO is a better place for questions about MathOverflow.
The sites (oops, they are no longer sites but communities) are quite different in their focus and thus they complement each other instead of being competitors. Occasionally, people ask:
If I have a maths ...
There are a few things here:
In order to migrate a question to MathOverflow one should flag it for moderator attention and request that the question will be migrated. Either the moderator who handled the flag is sufficiently knowledgeable in the field and can do it themselves; or they consult a MathOverflow moderator/user for the suitability of the question ...
... having asked it here, where it is not getting any attention?
In such a situation (MO-level post not getting any action at MSE), you, the question owner, can request migration to MO by flagging your post for moderator's attention.
The above situation is largely unrelated to the question of whether there should be an established migration path to MO. ...
Let's at least implement this for very popular arXiv-style tags (ag.algebraic-geometry and such) — it's useful both for migration and for (admittedly rare) visitors from MO asking questions here.
On the other hand, creating synonyms for numerous small tags (like recurrences used for less than 50 questions on MO) seems (to me) to be an overkill.
I have answered or commented on some of the questions of the OP, which are very much in my area. I can propose a possible reason why "most questions are unsolved yet, some of them up to a month old". Of course, many people on this site are willing to try to answer technical questions, and at least in logic there are a number of experts active here and also ...
Just trying to give an alternative answer to that of Henning:
We should recommend a migration if the question is in a rather narrow field and there are only a few not-very-active experts on MSE, while on MO there is a better chance for an answer.
We should, however, wait a day or two before migrating in case someone does answer on MSE.
Here's a step-by-step:
Wait a sufficient number of days. (At least one week.) This is just in case someone on Math.SE can answer your question.
Flag for moderator attention. Request the moderators to move the question to MathOverflow.
At this point, one of two things may happen (though it may take a few days).
One of the Math.SE mods with some expertise ...
You cannot ask questions on Mathematics Stack Exchange because you are currently question banned. This ban is automatic and kicks in when some algorithm decides that your question contributions are of poor quality, and are not of positive value to the community.
In contrast, you are not question banned on MathOverflow.
Though both sites are part of the ...
It depends on what you want the answers to be like. There's a certain difference in tone between MO and MSE posts stemming from the expected audience. MO is full of real deal, bona-fide, research level mathematicians; MSE has some of those, but also undergraduates, math hobbyists, and research types from other fields. Answers on MO assume a certain level of ...
This is an important issue to get right.
The two math sites are clearly different and are aimed quite
deliberately at different but overlapping populations of users,
questions and answers. The same question, were it to be posted on
both sites, would receive very different kinds of answers and
levels of attention at the two sites. It seems to me that we ...
While the topics are different, a blog post that Robert wrote some time ago explores the reasoning behind 'splinter' sites, and under what reasons we'd support them. There are also technical considerations to speak of, MathOverflow was an autonomous SE 1.0 site not connected to the Stack Exchange network in any way for a very long time. They've been part of ...
I mostly agree that it'd be unusual for MSE questions to be migrated to MO.
Let me give one example of a question that I think should have been migrated. This question only received an answer because there was a post at meta.mathoverflow.net asking people to have a look at it. Migrating is a better way of achieving the same goal that cross-posting did.
The first thing was StackOverflow, for programmers to help each other. Perhaps some offshoots for other topics had already happened, but MO was set up on SE 1.0 and running by September 2009. This place, MSE, started roughly a year later, for all levels of mathematics.
MO is now an SE 2.0 site, but with some legal documentation that allows MO a good deal of ...
I have keyed in the synonym mappings for most of the arXiv tags.
A few slight mismatches:
ca.analysis-and-odes points now to analysis; ODE questions will need retagging manually after migration from MO.
ra.rings-and-algebras now maps to abstract-algebra.
cv.complex-variables goes to complex-analysis.
qa.quantum-algebra becomes quantum-groups.
Done. See https://math.stackexchange.com/help/on-topic
I also moved the caveat about Mathematica up a bit: the site is now graduated and people really are much, much better off asking Mathematica questions there than here.
There is one more factor which should be taken into consideration when deciding whether to use MathOverflow or Mathematics and that is the level of answers you expect. (IIRC this was mentioned several times in the rather heated debate shortly after MO joined SE network: What, when and will we migrate questions to MO 2.0?)
According to description given on ...
Nope. MathOverflow is (was?) part of StackExchange 1.0 and is run independently of the rest of the network. In particular, moderators cannot migrate to MathOverflow from anywhere else in the network. Just post it on MO (making sure to link both questions to each other).