Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
#126 Re: Help Me ! » Contour integration » 2010-10-14 02:19:28
Let us get down to basics:
An integral is nothing but a sum of too many products
#127 Re: Help Me ! » Problem involving Taylors remainder theorem » 2010-10-09 00:51:48
Great Post
#128 This is Cool » Cut your own Paper Flake! » 2010-10-09 00:49:15
- George,Y
- Replies: 0
#129 Re: Help Me ! » Probability » 2010-10-04 23:46:44
Bayesian Theorem
#130 Re: Help Me ! » Is there such a function? » 2010-10-04 22:53:05
This kind of problems is created only in real number theory.
#131 Re: Help Me ! » Probability and Statistics - Bayes' Theorem » 2010-10-04 22:51:12
P(T1 | B2) = (8 choose 1)/(10 choose 2), as there are (8 choose 1) ways to select the remaining non-defective component.
--Mistake here
--Just Check out HyperGeometric Distribution
#132 Re: This is Cool » CauchySchwarzBunyakovsky inequality » 2010-10-04 22:24:11
Jane has already stopped discussing serious topics.
#133 This is Cool » The Great Design » 2010-10-04 22:21:11
- George,Y
- Replies: 0
#134 Coder's Corner » Sites for R programme » 2010-09-23 14:45:26
- George,Y
- Replies: 0
This is where the R guru go.
http://r.789695.n4.nabble.com/R-help-f789696.html
You can also sign up for the R-help mailing list which is basically the
same as the archive above, in real time
You can also ask R-related questions on stackoverflow
http://stackoverflow.com/questions/tagged/r
This is the best Chinese R website so far.
cos.name
#135 Re: This is Cool » Rolling dice: getting "33" vs "34" » 2010-09-23 14:43:43
This problem implicitly treats 34 and 43 the same.
#136 Re: Help Me ! » counting triangles » 2010-09-23 14:40:27
It is really a hard question on maps. Better get the answer sheet.
#137 Re: Help Me ! » Simple Mechanics Problem » 2010-09-23 14:39:24
S=t*(v0+vt)/2=t*(v0+v0+a*t)/2=v0*t+a*t*t/2
#138 Re: Help Me ! » Probability Problem » 2010-09-23 14:36:19
It is a pity that there are few books explaining useful distributions.
#139 Re: Help Me ! » Probability Problem » 2010-09-23 14:35:14
Yes, it is a typical hypergeometric problem.
For more teachings on probability distributions,
I would recommend this book
Models for Probability and Statistical Inference: Theory and Applications
by James H. Stapleton
#140 Re: Help Me ! » 2 problems: limit and inverse » 2010-09-23 14:28:56
y=x*ln(x) x>0
exp(y)=exp(ln(x)*x)=x^x
#141 Re: Help Me ! » probability/measure theory question. » 2010-09-15 15:20:11
If you mean changing the probability from univariate to bivarite like U=X*Y, where X and Y are i.i.d variables. The marginal density for each is still the original density of X.
#142 Re: Help Me ! » What is second partial derivative? » 2010-09-13 20:54:40
Well it is the accelaration with respect to x and x only.
#143 Re: This is Cool » CauchySchwarzBunyakovsky inequality » 2010-09-10 16:14:34
A good one
#144 Re: Help Me ! » Matrix X'X=A is given <- how to get X? » 2010-09-10 15:32:35
I guess you should take primary manipulation both horizontally and vertically until you reduce it to simple I matrix, that is
A=P[sub]n[/sub]...P[sub]3[/sub]P[sub]2[/sub]P[sub]1[/sub]IP'[sub]1[/sub]P'[sub]2[/sub]P'[sub]3[/sub]...P'[sub]n[/sub]
#145 Re: Euler Avenue » Cauchy sequences of rational numbers » 2010-09-10 14:46:18
Great manuveur
#146 Re: Help Me ! » triple integral » 2010-09-10 14:39:04
Could you just change the integration order to
y->x->z ?
#147 Re: Help Me ! » problem about definition of integration » 2010-09-08 17:49:07
why is it correct though?
#148 Re: Help Me ! » Why does an Linear Congruential Generator work? » 2010-09-08 17:46:12
Indeed bob it should be proved this way.
I already asked JaneFairFox for help, for she mentioned this theorem before.
#149 Re: Help Me ! » Explain why 0.3 = 0.30 = 0.300 etc. » 2010-09-08 17:44:48
Hi bobbym, it involves the problem whether real matter is abitarily divisible. If not, there is some N that 1/10^M (M>N) of a particular piece does not make sense, like saying 1/100 of a water molecule.
#150 Re: Help Me ! » probability » 2010-09-05 18:58:37
Just solve
∑f(x)=1