You've asked three questions on the Theoretical Computer Science site and received replies to your concerns about the downvotes:
I'm not downvoting; but I notice that you still ignore my (hopefully good) suggestion of carefully studying/reading Sipser's "Introduction to the Theory of Computation" (and solve its exercises ;-) – Marzio De Biasi 6 hours ago
Let me try to interpret your idea: "Given the first partially filled row of a n^2xn^2 sudoku and a permutation operator (computable in P time) that generates the remaining rows; is it NP-complete to solve the resulting Sudoku?". Probably if you ask this simple question (adding more details about the permutator) it would not be downvoted ?!? Also considering the variants in which permutator is fixed or given as input. – Marzio De Biasi 6 hours ago
The questions you pose are ... not posed in a very clear manner. The first does not appear to be grammatical or interpretable to me. The second question appears to ask for some kind of link between your Sudoku code and matrix multiplication. Yet, as far as I can tell, there is no clue or suggestion of why there should be any link whatsoever. – mhum Jun 26 at 16:40
You've also tried on our site Computer Science, the question you seem to be most concerned with there is: Pseudo-Proof of Constrained Sudoku is co-np, I say that because you asked only about that one on their Meta in this question: What to do if your best questions are getting downvoted? .
The answer for your question (the first link above) was offered by one of the moderators, and a comment to your question on their Meta (the second link above) offered by another moderator reiterated that advice, which is:
"I'd like to give some general advice. Before trying to tackle this problem, I suggest you spend a bunch of time studying the fundamentals. Set aside Sudoku and your ideas for a few weeks, and find an online course where you can learn complexity theory. That will give you a mathematical framework that, once you've learned it, you can come back and apply to Sudoku. Until you've done that, it is pointless to continue trying to frame questions like this.".
You replied and have a conversation (explanation) going on there. There's a common point being made in many of the comments. It's not the length, it's the content.
Downvotes on other sites can be for any number of reasons and asking about that here would be a duplicate. The moderators have offered a suggestion explaining why you are receiving downvotes there. Reread, address those concerns with edits to improve your question, and wait for upvotes - and everything will be repaired.
Downvotes here to a "feature request" are supposed to be because people don't agree that they want the feature to be implemented, it also doesn't appear that you've offered a simple and foolproof way to automatically determine if people understand a lengthy explanation.
You might try summarizing the problem in the first sentence or paragraph, and choose a title that will attract people interested in your question.
In the next few paragraphs try to set out your problem as simply as possible while also ensuring that it is completely described.
Finish your post with any additional optional information that addresses any questions that you might foresee.
That way if someone has a short attention span they get the most out of what little they have read. Don't expect that to be effective in all circumstances, I've caught people missing the first few words of the first sentence or not understanding short posts.
There are no Lifejacket or Lifeboat style badges for people whom write the questions, only for those whom offer the answers. People can downvote questions without penalty while downvoting answers has a small cost which some begrudge losing.
All the sites has a slightly different standard for up/down votes, both in frequency and deservedness. Just as there are some questions one can not answer and it's best to try elsewhere so too are there sites where you can't pose a great question that attracts a lot of interest; so try answering instead or find another site with a subject that you are better at writing questions for.