## How to linearize equation?...

How to linearize eq (6) by neglecting all higher order terms i.e., epsilon[1]^2, epsilon[2]^2, epsilon[1]*epsilon[2]... etc? How to do it in maple?

Calculation.mw

## How to find values of w?...

How to find values of w for which determinant of A is zero?

determinant.mw

## Contour with different colors such the region abov...

I want to change the colors of a contour such that the region above zero is represented by a different color instead of yellow color,  and that the colors for conts <0 are one set of colors (maybe yellow to red), and the area for which conts >0 is one color which is very different from the others (so maybe white).

Case4Contour.mw

## Exporting data to excel...

Hi

I wanna export data from maple to excel and I tried this:

ExcelTools:-Export(op([1, 1], plots:-display( convert( ans1[12..14,3], list))));

I was expecting 4 columns including z vector and 3 columns from ans1[12..14,3] but got only 2 columns.Case1_Revised_080922.mw

## Surface or contour plot of discontinuous function ...

Please, how do I use surface or contour to plot discontinous function?

z = f(x,y) := x-.8193318913*sin(x)*cos(x)/(cos(x)^2+sinh(y)^2)-(0.2931044702e-2*(0.7500000000e-3*x^2-0.7500000000e-3*y^2+0.1622336517e-1))*sin(x)*cos(x)/(((0.7500000000e-3*x^2-0.7500000000e-3*y^2+0.1622336517e-1)^2+0.2250000000e-5*x^2*y^2)*(cos(x)^2+sinh(y)^2))-0.4396567053e-5*x*y*sinh(y)*cosh(y)/(((0.7500000000e-3*x^2-0.7500000000e-3*y^2+0.1622336517e-1)^2+0.2250000000e-5*x^2*y^2)*(cos(x)^2+sinh(y)^2)):

## How do handle float undefined in my data...

The matrix data[gridji,4] in my code has float undefined. Please, how do I handle it?

## Can we convert expression into determinant...

Can we convert expression into determinant of 3 rows and 3 columns?

convert.mw

## v matrix in terms of u matrix...

Can we write v matrix in terms of matrix u? i.e., v=const*u.

uv_mat.mw

## How to solve system with one discrete variable?...

We have the system with one discrete variable along x-axis (i.e. 'i' is discrete in the attached file) and other variable 't' is continuous. But maple return error.

CD.mw

## Extract domain number...

Is there any command that allows me to extract the input number of any function f?

exmple:

f: (x1; x2;...;xn)-> y

command (f)=n

thanks for the help!

## Binary Recursive algorithm ...

I need to define a simple recursive algorithm (i'm not a programmer) such that:

xi=xi-1+b

with i=0,1,...,n;

and with all xi's elements of a Set A

how can i achieve this?

## differential system...

hallo every body

how do i solve this differential linear system with respect lambda is positive number

i use maple 18

Let the differential system with $\lambda>0$

$$\begin{array}{ccc} \dot{x}=y(t)\\ \dot{y}=z(t)\\ \dot{z}=-\lambda y(t)-h(t) \end{array}$$


prob.pdf

## Why maple return trivial solution after integratio...

Why maple return trivial solution after integration (see (11) in the attached .mw))? The result should be some non-trivial solution.

solutionsg.mw

## Relation between w and k...

I want to find the relation between w and k by putting Determinant(A) is equal to zero. Since the determinant is large (A is a matrix of size 6x6) and I am not able to find the simplified expression. How to do that?

determinant.mw

## Bifurcation of SEIR...

Hi,

Please can someone help me with a sample code for bifurcation? You can use parameter values for the parameters. I'm using maple 18. Below is my model:

 > restart:
 > f__1 := Delta -(psi + mu)*S(t);
 (1)
 > f__2 := psi*S(t) -(delta + mu)*E(t);
 (2)
 > f__3 := Delta*E(t) -(gamma+gamma__1 + mu)*X(t);
 (3)
 > f__4 := gamma__1*X(t)-(eta + xi + mu)*H(t);
 (4)
 > f__5 := xi*H(t) - mu*R(t);
 (5)
 > f__6 := gamma*X(t)-eta*H(t) - d*D(t);
 (6)
 > f__7 := b*D(t) - b*B(t);
 (7)
 > f__8 := phi__p + sigma*X(t)+eta__1*H(t) +d__1*D(t)+ b__1*B(t) - alpha*P(t);
 (8)