meta user
network profile
| bio | website | |
|---|---|---|
| location | Beijing, China | |
| age | 18 | |
| visits | member for | 11 months |
| seen | May 17 at 10:39 | |
| stats | profile views | 103 |
I am a 3rd year student in China University of Petroleum (Beijing).
Knowledge fragmented and inadequate. Green in C. Starter in C++, MFC, AS 3.0, 3ds Max polygon modelling.
Learnt some calculus, simple PDEs, introductory linear algebra, basic oo concepts and learning Al-Gore-ithms. I will keep maths as one of my permanent interests, say abstract algebra.
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May 17 |
awarded | Caucus |
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Feb 20 |
suggested | suggested edit on Using Taylor's Theorem to show that $\ln(1 + x^2) \leq x^2$ |
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Feb 15 |
comment |
Maximize $f(p)=(k-p)^2+(p-1)^2$ To OP: Please justify max/min. Minimize is the way. See Dominic's answer. I also suspect that this ought to be a multivariate function $f(k,p)$ otherwise $p=1$ and $p=k$ cannot be achieved when $k\ne 1$. |
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Feb 15 |
accepted | Inverse Laplace Transform involving $\cosh$. |
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Feb 3 |
reviewed | Needs Improvement Planar and non-planar graphs |
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Feb 3 |
reviewed | Satisfactory Complex analysis (periodic function) |
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Feb 3 |
awarded | Custodian |
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Feb 3 |
reviewed | Satisfactory Find the coordinates of a point on a circle |
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Jan 20 |
awarded | Informed |
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Dec 27 |
comment |
Inverse Laplace Transform involving $\cosh$. Oh you're right! And I am reading your answer now. |
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Dec 26 |
comment |
Inverse Laplace Transform involving $\cosh$. @rlgordonma Appreciate your attention, but Hans Engler's statement is true. Please take your time to elaborate on your answer, because I'm going to sleep. |
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Dec 26 |
comment |
Inverse Laplace Transform involving $\cosh$. I can't comprehend becase I have no basics in complex analysis, and it will take me some time to learn it. Also, the Laplace transform of your result is off by 2h's, as in $\cosh$ to $\cos$. Have you switched $\cosh$ to $\cos$ in the middle? |
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Dec 26 |
revised |
Inverse Laplace Transform involving $\cosh$. rolled back to a previous revision |
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Dec 26 |
comment |
Inverse Laplace Transform involving $\cosh$. @doraemonpaul I don't want to add the tag to PDE because this question isn't about PDE (at least right now). I will add PDE if any request is made to post the full question. I will revert this retag. |
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Dec 26 |
comment |
If something happens to 1 in 100 persons, is the chance of that person being you 50/50? There are 200 people in one of my classes. (horribly many). The teacher (uniformly) picks random students and asks him to answer a question. After about 60 students, I was picked. So for most people, it'snot 50/50. If your teacher has $1/2$ chance of picking you and $1/2$ chance picking from the rest, then it's 50/50. So, it depends on your distribution and how you ask questions. |
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Dec 26 |
asked | Inverse Laplace Transform involving $\cosh$. |
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Dec 19 |
comment |
Constrain Random Numbers to Inside a Circle Possible 2D Duplicate of: math.stackexchange.com/questions/91109/… |
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Dec 6 |
revised |
Lowest surface-to-volume ratio for an uncovered vessel My bad. The 18 should go into the sqrt. |
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Dec 6 |
suggested | suggested edit on Lowest surface-to-volume ratio for an uncovered vessel |
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Dec 6 |
revised |
Lowest surface-to-volume ratio for an uncovered vessel This is an interesting question but unfortunately it's old and unanswered. |
