The study and application of differential equations in pure and applied mathematics, physics, meteorology, and engineering. | Contact experts in Differential Equations to get answers
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Questions related to Differential Equations
Hi ! I need some help in finding a simple method to transform any linear PDEs in IR^2 into linear complex differential equation or pseudo-linear complex differential equation.
12 December 2015 7,970 8 View
Unlike the Integrate-and-Fire (IF) neuron model, the spike-response model (SRM) (Gerstner & Kistler, 2002) parameters depend on the time since last output spike and, while IF models are...
12 December 2015 6,993 0 View
Is it useful to transform problems between difference equations and differential equations ?
12 December 2015 2,184 8 View
If we have a data set which has three independent variables and one dependent, the question here is how we can fit a differential equation that describes the these variables.
12 December 2015 370 9 View
a function f(x,y) Any suggestion of a function f(x,y) such that the partial derivative with respect to the variable x is ax and with respect to the variable y is bx?
12 December 2015 7,472 5 View
effective way to find lyapunov function
12 December 2015 6,671 6 View
For a complex differential equations with meromorphic coefficients of finite (p,q)-order, it's well known that if f is a solution then (p+1,q)- order of f is less than max{(p,q)-order of...
12 December 2015 6,603 0 View
which are good studies : studying the difference ( differential ) equation purely or deriving it from a phenomenon and then start the studies ?
12 December 2015 7,090 2 View
Is the piecewise finite element space subset of RT space?
18 November 2015 9,393 3 View
From what I can find, the proof of the Centre Manifold Theorem uses the Contracting Mapping Theorem which gives a unique solution. So my question is, where does the non-uniqueness come from in the...
11 November 2015 584 15 View
In the first decades of the twentieth century Minkowski introduced the field strength tensor. This tensor raises several false suggestions. In order to elucidate this criticism, it is necessary to...
11 November 2015 5,545 2 View
Why the Second order differential equations tends to zero, with respect to t?
11 November 2015 2,235 5 View
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11 November 2015 1,663 0 View
03 November 2015 7,392 14 View
Electroflocculation (or electrocoagulation) is an electrochemical process used to clean water in industry. Its chemical description, with the ionic behavior and its respective balance, is well...
19 October 2015 5,069 2 View
What is the need to define Elzaki transform?
17 October 2015 2,426 2 View
We want to use HAM Method, a numerical method of solution to solve flow and heat transfer problems under certain boundary conditions.
12 October 2015 3,006 1 View
I know that in dimension 1 it is p2/4, but for larger dimensions? Perhaps there is a known formula but also some estimates could be useful
10 October 2015 5,202 2 View
I have a problem of understanding the Definitions of the Fractional-Order Calculus which make the foundation of the fractional order controllers. How I can study and understand this theory in a...
10 October 2015 3,112 7 View
d^2(x)/dt^2 = 9.8 - B * u^2 B - constant x - state/position u - control input
10 October 2015 534 0 View
10 October 2015 1,091 2 View
I have to solve a 2nd order differential equation system(9*9) in matlab and I have some problems with it: the functions that I have are like...
10 October 2015 9,675 1 View
Hi, I'm trying to simulate a second order system (see the picture and simulink file attached). It´s a system where each equation has a different time scale. "I1" is in function of "mi", and "I2"...
09 September 2015 7,758 8 View
In my ECG recordings, I periodically add increasing concentration of high calcium ringer's solution with an interval of 10 minutes for each concentration. I noticed that for an increase of...
09 September 2015 3,158 3 View