Math

Did Archimedes could knew this?
On May 8, 11:22 am, Ludovicus <luir...(a)yahoo.com> wrote: Lim  (Arc - cord) =  (Tangent - arc) / 2 Because in that case he could have  improved the calcul of Pi through: Lim Arc = (2*cord + tangent) / 3 As he stablished that   3 + 10 / 71 < pi < 3 + 1 / 7 he could have taken  C = (20 / 71 + 1 / 7) / 3 ... 11 May 2010 06:46

Determining the maximum of a complex function with 2 variables (optimization problem)
Hi, I need to find the maximum of the following function: f(w1, w2) = | h1*w1 + h2*w2 | + | h3*w1 + h4*w2 | where h1,h2,h3,h4 are complex constants and w1,w2 are complex variables. The additional constraint is |w1|<=1 and |w2|<=1. (|.| is the absolute value or modulus) If this is too complicated to be so... 10 May 2010 10:58

Something about Nash(non cooperative game)
En bipersonal games non cooperative if the strategies tends to infinite there is not Nash point of equilibre ... 9 May 2010 14:20

Do close flows which are far from the identity have close vector fields?
Suppose I have two vector fields v and w such that 1) |v|>a, |w|>a 2) v_t and w_t are the corresponding flow and |w_1-v_1|<b is it true that assuming 1 and 2 we have |v-w|<C*b/a ? The only way I see to prove this is to consider the vector field as the fixed point of the relation v(v_1(x))=Dv_1(x)v_1(x) but t... 9 May 2010 14:20

Characterization of numbers related to Inclusion-Exclusion principle
Characterize numbers a,b,c,d,e such that there exist five sets A_i, i=1,..,5 satisfying |A_i|=a for all i; |A_i \cap A_j|=b, for all i=/ j; |A_i \cap A_j \cap A_k|=c for all distinct i,j,k and so on. Of course two neccessary conditions on these numbers are that 5a-10b+10c-5d+e must be positive, and t... 10 May 2010 09:52

a problem I worked on once
Some unusual things happen when a parabola undergoing rotation is also accelerating to the speed of light. These are the equations and the moving graphs, but I have yet to understand what it means. This gives the framework: http://mypeoplepc.com/members/jon8338/math/id41.html This gives the result: http://my... 9 May 2010 13:14

Difference of nonvanishing vector fields
Given two vector fields on R^2 V and W consider the vector field given by the difference V-W. If V and W are always nonzero can V-W have nontrivial periodic orbits? ... 9 May 2010 13:14

Mersenn Prime Conjecture: In all cases 2*2^N-1 = Prime, N+1 = A MERSENNE PRIME
2*2 ^ N -1=Prime 2*2^606-1=Prime? True N=606 N+1=607 SO 2^607-1 MP 607 IS A MERSENNE PRIME! HTTP://MEAMI.ORG/ ... 9 May 2010 12:08

My 'crime tip' to the FBI
If I do not receive suitable response to this post in 14 days I will post a A4 color goatse pic to every one of your 56 offices. I posted a micro SD chip of my video complaint to the FBI 3 weeks ago. The video is at www.AustralianFederalPolice.com If this matter continues to be ignored I will rent WhiteHouse.c... 11 May 2010 02:27

Fixed point space
Thanks Dale. for the counter examples. Are there any results about the product of two fixed point spaces being a fixed point spaces? For example, is product of two compact connected linear order spaces a fixed point space? A compact connected linear order is a fixed point space. If S is a fixed point line... 9 May 2010 05:42