Maple 18 Questions and Posts

These are Posts and Questions associated with the product, Maple 18

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?

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

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).


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

Please any help?

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)):

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

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

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

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.

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


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

command (f)=n

thanks for the help!

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



with i=0,1,...,n; 

and with all xi's elements of a Set A

how can i achieve this?

hallo every body 

please can you help me 

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

i use maple 18

Let the differential system with $\lambda>0$

\dot{z}=-\lambda y(t)-h(t)


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

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?


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:


f__1 := Delta -(psi + mu)*S(t);



f__2 := psi*S(t) -(delta + mu)*E(t);



f__3 := Delta*E(t) -(gamma+gamma__1 + mu)*X(t);



f__4 := gamma__1*X(t)-(eta + xi + mu)*H(t);



f__5 := xi*H(t) - mu*R(t);



f__6 := gamma*X(t)-eta*H(t) - d*D(t);



f__7 := b*D(t) - b*B(t);



f__8 := phi__p + sigma*X(t)+eta__1*H(t) +d__1*D(t)+ b__1*B(t) - alpha*P(t);






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