Larry Wang
Reputation
4,296
Top tag
Next privilege 5,000 Rep.
Approve tag wiki edits
 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 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 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 16 comment Optimal sample size? See the proposed faq on meta for some pointers on how to type math here. Sep 16 comment What is the meaning of the double turnstile symbol ($\models$)? TeX fixed - see meta.math.stackexchange.com/questions/692/… Sep 15 comment Is this proof of $a^{1/2}$ being either integer or irrational circular/incorrect? Closing for 3 votes + Isaac♦ and myself Sep 15 comment fast and reliable method for testing invertibility of Hermitian Toeplitz matrix See also Mathworld and Wikipedia's descriptions of the condition number. If you are using some linear algebra library, note that many calculate the reciprocal of the condition number by default. Sep 15 comment Direct proof that f(x)=x sin(1/x) does not satisfy Lusin N condition @Myke: I believe \sout requires the ulem package, which is not installed. The html way is to use text (or text) Sep 15 comment How can I pack $45-45-90$ triangles inside an arbitrary shape ? What Moron stopped short of saying outright is that you can lay your image on top of a square grid, then shade in all squares that are part of the shape (filled or >half filled, for small enough squares it doesn't matter), and bisect them to get the triangles you want. I don't write this as an answer because although it answers your question as written, I think it also suggests some clarifying edits you may wish to make to bring it closer to your 'real' question. Sep 15 comment Improve my proof about this $C^\infty$ function If you have questions about typing cases and other constructs, see meta. Sep 15 comment Is this proof of $a^{1/2}$ being either integer or irrational circular/incorrect? Since @Bill created a meta-question, let's keep the discussion of whether to close or not there. Sep 15 comment How can I pack $45-45-90$ triangles inside an arbitrary shape ? It's not mentioned in the question, but I guess you would like to use as few triangles as possible to accomplish this? Sep 13 comment Solving Compositions of Functions Algebraically @Meta: In that case, would you accept Arturo's answer (or your own, if it ended up being significantly different)? Sep 11 comment A challenge by R. P. Feynman: give counter-intuitive theorems that can be translated into everyday language Edited to use SO's image hosting instead of mine