How to plot the surface $z=\sum_{n=0}^100 x^{2-n}y^{n/2}$ for $0<x,y<10$ in MATLAB ?

How to plot the surface $z= f(x,y)=\sum_{n=0}^100 x^{2-n}y^{n/2}$ for $0

05 June 2018 242 7 View

As we know that the double sequence $x_{mn}$ represents an infinite matrix, in the similar way how we represent a triple sequence $x_{lmn} $ ?

How we represent a triple sequence?

08 September 2017 9,115 2 View

How could we represent a four dimensional identity matrix ?

06 July 2015 6,638 10 View

Is there any name of a matrix with all elements above super diagonal position at zero?

31 December 2014 5,368 6 View

What is the limiting value of (sin x)^x as x tends to 0 ?

What is the limiting value of (sin x)^x as x tends to 0 ?

11 December 2014 1,174 0 View

Is there any formula to find the nth root of a Matrix ?

We know square root of a matrix, but in general what is the fractional and non-integral power of a non zero matrix ?

08 September 2014 4,318 1 View

What is the use of Kernel in integral transform ?

07 August 2014 1,476 1 View

What is the time complexity for the inversion and determinant of a triangular matrix of order n?

By backward and forward substitutions we calculate the inverse of a triangle. How far is it better than the determinant method concerning the running time?

03 April 2014 5,441 5 View

Is there any series expression of the Euler gamma function?

Although there are many singularities of Euler gamma function in negative real axis, but for the positive axis the function is well defined.

02 March 2014 2,394 9 View

Does Laplace transform of e^{t^2} exist ?

Although, the function e^{t^2} is not exponentially bounded and due to linearity of Laplace transform we may write L {(e^{t^2}}=L{1+t^2+(t^4)/2!+(t^6)/3!+....}...

01 February 2014 3,439 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

What are the application of Fixed points thoery in Chemistry.?

It is said that fixed point theory has lot of applications not in the field of mathematics only but also in various areas. So I am looking for applications in Chemistry only..

26 February 2021 3,533 1 View

Can I ask did any good platform or journals for learning the calcluation on the reference governors and command governor?

Recently I face some problems with the mathematical ( calculation) on the reference governor and command governor, so I need some help from you all to get which platform or journal can let me...

23 February 2021 7,746 2 View

Special issue on PLS-SEM in Mathematics. Are you interested?

21 February 2021 5,601 3 View

What is the better software for approximation of 3D surface with equations?

I have a massive of x, y, z coordinates of 2D surface in 3D space, which builded in Ansys HFSS or AutoCAD. How can I get the analitical aproximation of this surface by formulas?

21 February 2021 3,444 7 View

How can I obtain a sine function along a path with known equation?

I have a symmetric airfoil with known equation. Now a sine function passes along the airfoil equation like following figure. I want to find the sine function in (x,y) coordinate system.

17 February 2021 1,594 12 View

Does learning mathematics exclusively improve cognitive abilities?

Teaching Mathematics at school to all students is commonly justified by the opinion that it improves their problem-solving skills and "makes them smarter" (whichever measure is implied by this). I...

15 February 2021 7,391 7 View

Can we help fellow mathematicians get free ?

https://terrytao.wordpress.com/2021/02/08/a-statement-from-mathematics-department-faculty-at-stanford-and-mit/ Terry Tao blogged about this unfortunate event. Kindly share among Mathematical...

08 February 2021 1,055 3 View

Theoretical computer virology ? is still alive ?

HI Everyone! I am asking to know by you, expert in cybersecurity and mathematics, if Computer virology (the one of Cohen and Andler) is still an active field of research. That research made in...

08 February 2021 7,613 6 View

Fractional derivative users, are you on the same page with me on the validity of the fractional order parameter, say alpha?

Taking a fractional ODE problem as an example. It has come to my attention that if the fractional order parameter is in the interval (0,1], many only presents results for alpha=0.9, 0.99. I saw...

08 February 2021 9,671 3 View