Larry Wang
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 Sep 28 comment Why do statements which appear elementary have complicated proofs? @Qiaochu: Users are only notified when addressed by @ if they have previously commented on the same post. See the faq on meta.so. Sep 25 comment Group Law for an Elliptic curve @muad: This phenomenon is known as the bikeshed problem, and the most constructive way to change it is to share this question (and others you think deserve more love) with people who might be interested in it. Sep 25 comment Why do statements which appear elementary have complicated proofs? I've changed the title to more closely reflect what the question seems to be asking, but I'm not convinced that it's any 'better'... Sep 25 comment Why do statements which appear elementary have complicated proofs? Discussion of whether this question is appropriate should take place on meta. Sep 25 revised Why do statements which appear elementary have complicated proofs? edited title to be closer to last paragraph of question Sep 25 revised Why do statements which appear elementary have complicated proofs? +tag philosophical Sep 24 comment Types of infinity Possible duplicate: math.stackexchange.com/questions/1/… Sep 21 comment Free resources to start learning Discrete Mathematics This question is actually a superset of the first question I linked to above, so perhaps that one (about books) should be considered a duplicate of this? Sep 21 comment Free resources to start learning Discrete Mathematics See the suggestions given in math.stackexchange.com/questions/1533/… and math.stackexchange.com/questions/350/…. Sep 21 comment Indirect proof that sum of first n even numbers is $n^2 + n$ The picture here may give you some ideas. Sep 20 revised How do I prove that $x^TAy = y^TAx$ if A is symmetric? texed equation, put question in title, add homework tag per question body Sep 17 revised Given a collection of items, how many ordered subsets can I make? texed sum, better title, tag -permutations +combinatorics Sep 17 comment Given a collection of items, how many ordered subsets can I make? @AvatarOfChronos: To add on to Moron's comment, you can right-click any existing formulas and click 'show source' to see how to write something similar, or see your edited question. For more details, see the proposed faq. Sep 17 revised How many 7-digit even numbers less than 3000000 can be formed using all the digits 1,2,2,3,5,5,6? tag -permutations +combinatorics Sep 17 revised Wedge product and cross product - any difference? removed unhelpful tag [vector], added tag [terminology] (maybe should be notation?) Sep 17 revised What are the names of graphs with 2 in/outbound edges? added [terminology] tag Sep 16 comment Optimal sample size? See the proposed faq on meta for some pointers on how to type math here. Sep 16 revised Optimal sample size? forgot the $; added 1 characters in body Sep 16 revised Counting placing items in bins according to boolean restrictions added text of moron's answer Sep 16 comment What is the meaning of the double turnstile symbol ($\models\$)? TeX fixed - see meta.math.stackexchange.com/questions/692/…