Description:
Mathematical discussions and pursuits.
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Fiber product topologies
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Dear NG, Here's a problem that I've been thinking about and it must actually be easy.. but I can't seem to figure it out straightforward as of yet.. Let X,Y,Z be compact spaces (not necessarily Hausdorff) .. and suppose there are continuous surjective maps X -->> Z , Y -->> Z One has the fiber product of X x_Z Y... more »
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Discrete Math HELP! Graph Theory
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any pointers on these please help get me started: 1. (a) how many labeled graphs are there on n vertices? (b) how many of these have exactly m edges? 2. Are any of the following degree sequences graphic? If so, draw the graphs...if not, explain why. If you determine the sequence is graphic, work backwards to draw the graph.... more »
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Hopf bifurcation normal form not predicting oscillation frequency
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Hi, I have a 2D system (Hodgkin-Huxley style equations) that undergoes a Hopf bifurcation at some parameter mu0. For mu < mu0, the system is stable (both eigenvalues are negative). The normal form of the Hopf bifurcation is rdot = d*mu*r + a1*r^3 + ... thetadot = w + c*mu + b1*r^2 + ... where w is the non-zero complex part of the eigenvalue at the... more »
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Review of the new Symbolic toolbox included with MATLAB 2008b
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On Nov 2, 1:15 pm, "Vladimir Bondarenko" <algebraist...@yahoo.com> wrote: ...Greeting to our NASA visitors! We'd just like to make it clear that now we are in the process of lifting the restrictions we had at the early stage of the VM machine development. It means that the new modules we are adding will result... more »
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Trade marketplace,fashion product,luxury Porduct,Discount Price
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hi We are supplier in china Footwear Apparel Handbags Jeans&Pants Cap Accessory(world famous brand) 1) Top quality, reasonable price, safe shipping, and best service 2) Sport shoes for men, women and kids with all sizes available 3) Sport shoes with different colors and styles available in stock 4) The material and size can be required to make in accordance with... more »
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solution for matrix repeated multiplication
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I've been working on a problem, and got the following solution sequence: A(n) = the sum of all numbers in [4 2;2 1]^n so A(0) = 2, A(1) = 8, A(2) = 34, A(3) = 148, etc. Is there a way of reducing this expression to a more direct formula? Now, i solved the same problem in another way and got the recurrence relation:... more »
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Fourier series for computer output
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If the processor is writing the data to the Hard disk as 1's and 0's Ex:- 1011110111001............01101 0100.......[millions of 1's and 0's] Is it possible to handle this type of data, so that it can be written as, "Fourier series" if not, where's the problem lies ? Thanks.
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