I have never posted a question to Mathematics meta before and I hope this is the right thing to do. Yesterday I posted a question to Math Stack Exchange (is there a name for this function (parity of a finite sequence)?). I received a good answer last night, but not 100% of what I wanted. I posted a question to Computational Science Beta to try to get an answer to the remainder of what I wanted (I included a link to my original question at Math Stack Exchange), and I got a good answer. I posted a similar question to Stack Overflow lasta night and got an even better answer. Today I showed the improved answer to the respondent at Computational Science Beta. He told me today (but not last night) that cross-posting was discouraged.
Is this true? If so, why? I got distinct, useful answers from the three sites. I have cross-posted a few times in the past and no one complained. Once, I posted a numerical-methods type question at Math Stack Exchange, and I got a comment that I would get better answers at Computational Science Beta, so I posted it there, and I actually did get better answers there.
Regarding the question I posted last night, I could have broken it up into a math question and a computing question, posted the math question on Math Stack Exchange and the computing question on Computational Science Beta.
If I cross-post occasionally, word my questions so that they don't look the same, and don't tell anyone at any site about the posts on the other Stack Exchanges, is anyone likely to care enough to hunt me down and find out what I have done? I have enough experience at mathematics and computing to know when both math people and computational science people might be able to help me with a question.
I just spotted a Similar Question that may help me, and I apologize for not reading it first. But I will submit my question in case it has any particulars that may help you answer it.
More specifics: original math+computing question: is there a name for this function (parity of a finite sequence)?
(received good answer to math part of question)
(received good answer to computing part of question)
more focused computing question I formulated after attempting to answer computing question myself: https://stackoverflow.com/questions/16351039/is-there-a-built-in-function-in-matlab-to-determine-if-a-permutation-is-even-or
(received better answer than the one I got at Computational Science Beta)
Stefan (Stack Exchange FAN)