@DanielFischer I have to write a function for the destruction of the planetary system "solid". With the destruction of the planetary system, the asteroids where the gap between this one and the object, is smaller that "gap" will also be destructed. (so, they have to be deleted) The asteroids for which the gap is greater are converted to free-floating planets so they have to be inserted into the tree of free-floating planets. The total cost of the transport of all the asteroids that are converted into free-floating planets in the tree of free-floating planets should be $O(n)$, where $n$ is t…
To end a proof, I often write "as was to be shown" or "q.e.d". Both of these terms make sense to me as a reader. On the other hand, I feel a little strange to put down $\square$ although I saw it many times here and there. In fact, I learned $\square$ notation here. I wonder if anyone could give...
@MaryStar It's too big for me to check the logic, that would take more time than I'm willing to put into it now, but it looks reasonable. If you don't get segfaults even with a few bogus calls in your programme, that indicates it may be correct. But better run it through valgrind or so to check for leaks.
@MaryStar A suite of debugging and memory-checking tools. It used to have some problems on OS X, I don't know if they are fixed now. If you're using some unusual OS like OS X or Windows, you may need to use other tools, but memory checkers and debuggers ought to be available there too.
@Chris'ssis ugh ! :( then is there a sister of Au-Yeung ? ... (if one girl dumps you go after their sister =P) oh in your case its bro ! look if Au-Yeung has a bro ! ;)
@Jasper It blatantly states that it's a question from a final exam. Couldn't there be other people taking the same class with the final, say, tomorrow?
@Hippalectryon Distinct. Say $x_1$ and $x_2$ are roots of the function $f$. Then $x_2$ is an isolated zero if there exists a ball $B_\varepsilon$ around $x_2$ with radius $\varepsilon>0$ such that $B_\varepsilon$ does not contain $x_1$.
Is it okay if I say sth like "Just a simple request, with the Winter-Bash going on in SE network and the crazy Naruto fan I am, please accept my answer if you feel it is helpful to you, but do not upvote ! (I want a Naruto Hat)" below my answer ? =P
What's going on with the $xy^4$ and $xy^5$ inequalities? I keep seeing strangely worded questions of this kind. The very first one claimed it was for building a website....
@DanielFischer Sanity check : $p : X \to Y$ be a covering map, $h : X \to X$ a self homeo of $X$ then $p^{-1} \circ h \circ p : Y \to Y$ is well defined, am I right?
@Hippalectryon This is not about English. "i saw this equation posted yesterday and i wanted to ask if i could have help helping this kid solve it." (?)
Since I am not getting much upvotes on my alg topo answers I guess I should consider studying it thoroughly first before participating in answering questions on the mains. I presume my answers lack of quality.
@Hippalectryon Refresh the task counts on the right, or the list of posts in the main field? For the list of posts, I'd rather not, because often I'm slow to go through the posts there (editing etc), and I don't always go in chronological order. Auto-refresh would cause some items to scroll past before I get to them.
We generally don't do preferences, so this is unlikely.
I'd much rather pick a sane default that works for 90% of folks than have a bunch of configuration options.
But I think the criteria of Red Baron were poorly chosen; the hat is more likely to be obtained through vote coordination than through actual use of the site.
@Behaviour I agree. The first Red Baron was obtained fairly in the intended fashion. I have a question I think is a good question that only attracted downvotes because of poor formatting; then the only trouble is hoping people read it.
I've got a question. If $g$ is continous and $f$ is continous, so that $gf$ is the identity. So $f$ is open since for every $V$ that is open, $g(f(V))=V$ and thus the source of $g$ must be open and that's $f(V)$. Right? Or am I doing something wrong?
We generally don't do preferences, so this is unlikely.
I'd much rather pick a sane default that works for 90% of folks than have a bunch of configuration options.
