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location Madison, WI
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visits member for 4 years, 5 months
seen Dec 1 '13 at 4:08

Software Developer at Epic Systems


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 <s>text</s> (or <strike>text</strike>)
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
14
comment $\sqrt a$ is either an integer or an irrational number.
@Bill: What I meant was more that if you don't wish to describe what you dislike about this answer in your comments (perhaps it would be too long?), you could also add that information to your own answer and leave a comment here linking to it.
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)?