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At the time of writing, I have been a member of OpenStudy for over thee years. Please make me a moderator already so that I can help you weed out the plethora of litter countless "users" post daily.
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Questions Asked
across:
Group Title
FoolForMath and asnaseer,
I decided to give Project Euler 27 a try in C++ and ended up with this:…
updated 3 years ago
23 replies
7 Medals
Mathematics
across:
Group Title
Trivia: What axiom distinguishes the real numbers \(\mathbb{R}\) from the rational numbers \(\mathbb{Q}\) and what does it state?\[\]
updated 3 years ago
18 replies
8 Medals
Mathematics
across:
Group Title
Whilst seeking to recall a few things about metric spaces, I ran into the embarrassing problem of not being able to grasp the notion behind …
updated 3 years ago
3 replies
1 Medal
Mathematics
across:
Group Title
someone1348, let \(f\) be defined on an interval \(I\) and suppose that there exists \(M>0\) and \(\alpha>0\) such that\[|f(y)-f(x)|\leq M|x…
updated 3 years ago
2 replies
2 Medals
Mathematics
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Group Title
I once met a respectable professor who believed that there is no such thing as an irrational number. Unfortunately, he never stated his reas…
updated 3 years ago
17 replies
7 Medals
Mathematics
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Group Title
I was looking through my old tests and found a short but interesting problem. You guys give it a quick try!
---…
updated 3 years ago
70 replies
10 Medals
Mathematics
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Group Title
einmal mehr haben wir zwei neue planeten gefunden: http://web.mit.edu/newsoffice/2011/two-new-planets-found-1221.html die kommen doch sehr n…
updated 2 years ago
4 replies
2 Medals
Mathematics
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Mr. Math, could you help me graph \[(x^2+y^2-1)^3-x^2y^3=0?\]
updated 3 years ago
9 replies
4 Medals
Mathematics
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Express \(i\) in terms of \(u\):\[-2i + 4 > -2(3u - 2).\]
updated 3 years ago
13 replies
7 Medals
Mathematics
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How do I solve x + 3 = 5?
Now that that's out of the way, I quickly wanted to wish you guys a merry Christmas, a happy new year and a prosp…
updated 3 years ago
11 replies
9 Medals
Mathematics
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Group Title
I'm a die-hard Latex fan would like to share a cool website with you to format your questions/answers without having to type them here (the …
updated 3 years ago
6 replies
5 Medals
Mathematics
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Let's have some fun:
Express\[\sum_{n=2}^{\infty}n(n-1)c_nx^{n-2}+\sum_{n=0}^{\infty}c_nx^{n+1}\]as a single power series.
updated 2 years ago
6 replies
No Medals Yet
Mathematics
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What's the area of the surface described by the function\[z=f(x,y)=x^2-y^2-xy\]in the region\[R=[-1,1]\times[-1,1]?\]Go, go, go! :)
updated 3 years ago
26 replies
2 Medals
Mathematics
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How do you tackle non-linear, non-separable, non-homogeneous ODEs? I.e.\[\frac{dy}{dx}=\sin(x+y)\]
updated 3 years ago
2 replies
No Medals Yet
Mathematics
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I wonder what I did wrong... http://i40.tinypic.com/25g8gfk.png
updated 3 years ago
5 replies
3 Medals
Mathematics
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\[\frac{\partial u}{\partial t}=k\frac{\partial^2 u}{\partial x^2}\]\[u(x,0)=f(x),\]\[u(0,t)=0,\]\[u(L,t)=0.\]Let's have some fun.
updated 3 years ago
25 replies
3 Medals
Mathematics
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What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?
updated 3 years ago
25 replies
5 Medals
Mathematics
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Do all mathematicians have at least some mild case of OCD? I will admit to frequently being a noticeable perfectionist, specially when it c…
updated 3 years ago
7 replies
2 Medals
Mathematics
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Handle with care:\[\frac{\partial u}{\partial t}+c\frac{\partial u}{\partial x}+au=0.\]Let us solve for u(t,x)!
updated 3 years ago
31 replies
3 Medals
Mathematics
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Ich werde dir einen Stern geben, wenn du das verstehen kannst und wenn du die folgende Gleichung löst:\[y''-10y'+25y=0.\]Macht's Spaß!
updated 3 years ago
19 replies
2 Medals
Mathematics
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How would you describe the transition from studying ODEs to studying PDEs to an undergraduate student?
Now for the real question, is anyo…
updated 3 years ago
3 replies
2 Medals
Mathematics
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Is this BS? http://www.bigblare.com/1966-mystery-of-zero-resolved/
updated 2 years ago
11 replies
1 Medal
Mathematics
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A student asked me something, and I'd like to post it here for kicks.\[\frac{1}{2}\frac{2}{(s-3)^2-4}=\frac{1}{s^2-6s+5}=\frac{1}{(s-5)(s-1…
updated 3 years ago
4 replies
1 Medal
Mathematics
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Let's have some (Monday) fun!
I will give free medals for those who at least try to solve the following, not-so-bad differential equation:…
updated 3 years ago
3 replies
3 Medals
Mathematics
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Is it just me, or is mathematics never self-fulfilling?
Don't get me wrong: I treasure it with my whole soul, I can't resist a good puzzle…
updated 2 years ago
13 replies
7 Medals
Mathematics
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Fun DE time!
Given\[f(x)=\begin{cases}…
updated 3 years ago
7 replies
2 Medals
Mathematics
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Round four (>:P)
updated 3 years ago
3 replies
1 Medal
Mathematics
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Round three (-_-):
updated 3 years ago
8 replies
1 Medal
Mathematics
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Round two:
updated 3 years ago
4 replies
3 Medals
Mathematics
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The question is too long. Thus,
updated 3 years ago
8 replies
3 Medals
Mathematics
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