Recent content by Max0526

Thanks a lot, EnumaElish. The keywords were LOGIT and PROBIT. And I found a lot of software in the Inet (e.g.: http://www.oswego.edu/~economic/econsoftware.htm). I'll try to test the soft on my data. Hopefully, some of it will return a good result. Thanks again, Max.

"logic of the set" analyzer Hi; I'll start from an example. There's a given set of positive integers: {2, 4, 6, 8, 10}. The problem is to estimate a (relative) probability for any number (not included into the set) to follow the logic of the set. For the example above, the probable logic...

Hi; Look at this: http://mathworld.wolfram.com/AiryDifferentialEquation.html. Max.

Hi; The first substitution to use is "running wave" substitution: z=x-ct and you will have: \frac{\partial^2 u}{\partial x^2} - \frac{\partial^2 u}{\partial y^2} + 2\frac{\partial u}{\partial x} + u = 0 u_{xx}-u_{yy}+2u_x+u=0 z=x-ct u_{zz}-c^2u_{zz}+2u_z+u=0...

solution Hi; Here is your solution: y(x)=\frac{3sinx}{10}+\frac{cosx}{10}-\frac{7e^{-x}}{2}+\frac{2e^{-2x}}{5} Best of luck, Max. P.S. Obtained by Maxima: http://maxima.sourceforge.net/download.shtml

more links Hi, man; Check these links as well: http://www.chem.mtu.edu/~jmkeith/cm3120/matlab/blasius.m http://www-iwse.eng.ohio-state.edu/ISEStudents/xue/coursework/ME%20705/p2.htm http://www.ma.man.ac.uk/~ajuel/teaching/BL03notes5.pdf...

check this Clausius2, check this link for using Mathlab for solving of ODEs: http://math.rice.edu/~polking/odesoft/dfpp.html, and these ones for numerical solving of ODEs in general: http://mathlab.cit.cornell.edu/math_software_resources/math_software_resources.html...

hi Hi, Clausius2; > I am looking for a numerical solution, and I have been trying unsuccesfully > to understand the non-linear shooting method, in order to code it with > Matlab. Is it a goal to code it in Mathlab, or you just need to code it somewhere? And why non-linear shooting...

complete solution Hi, Clausius2; First of all, as I promised, here is a complete solution: http://www.max0526.fcpages.com/eq/clausius5.html. Then, can you please open a new thread for a new equation? Best of luck, Max.

new easy solution Hi, Clausius2; I found an extremely easy way to solve your equation. The idea is to substitute: u(x)=F'(x)+F(x)^2 That means that the original equation is reduced to: u(x)''=0 So u(x)=C_1x+C_2 F'(x)+F(x)^2=C_1x+C_2 This is a Riccati DE...

thanks Thanks to all of you, guys. I found it. Max.

I'm trying to find a location in the Internet where I can download (for free) the following DE paper: G´eronimi C, Feix M R and Leach P G L, Exponential Nonlocal Symmetries and Nonnormal Reduction of Order, J. Phys. A: Math. Gen. 34 (2001), 10109–10117. I know it exists here...

Maple 9 doesn't want to solve it Hi; Is it really \frac{1}{(s+1)^{2}(1+e^{-2s})} Maple 9 doesn't want to solve it. Can you check it just in case. Max.

solution Here is a solution, Max.

what your problem reminds me of Hi, QQ; 1) Your problem reminds me of a question which puzzles me: Imagine that we have a graph for a solution of some DE. I mean, all comparatively precise data for x and y(x). The question is: Does any procedure exist that can give us the quantitive measure...