Dear all, I am new here, so I am sorry in advance if I make some mistakes. The problem here is how to transform

system of 2 differential equations 4th order to the system of 4 diff equations second order, or how to reduce system of 2 equations 4th order on two equations second order with vanishing solutions which I choose because they are big. Here is example

I'm trying to use solve to find out if a system of equalities and inequalities has any solution or not, but maple 15 seems to be giving phantom solutions.  A simple example is the following:

  solve({ a + b = 1, a > 0, b > 1, c > 0 }, {a,b,c});

It gives the output

I have a set of equations

Hello,

I'm going to ask an question which I think it has an easy answer. However, I can't figure it out.

I wonder why f:x->sin(x)/x is not considered as a function. When I type "type(f(x),'function')", Maple says it's false, even though I don't know why. I'm asking this because I'm making a procedure in which one of the parametres is a function and when I type

aprox:=proc(fn::function,x::realcons,iteracions::integer)

Hi,

I am trying to do somthing like this (I actually have a 5D Array, this is a simple example) (mathematica code)

a = { {{1,2,3},{4,5,6}},{{1,2,3},{4,5,6}},{{1,2,3},{4,5,6}}};

Transpose[a, {1,3,2}]

 (* this {1,3,2} dictates what gets transposed e.g. {1,2,3}, would leave the Array the same, and the example transposes the last two dimentions*)

in maple.

After some research it seems it makes sense in maple to use an...

Is it possible to include a step in the range when plotting a function? For example, plot(sin(x)-1/2,x=-1000..1000, in steps of 10) or similar syntax.

Your help would be greatly appreciated.

thanks, rolf.

Hi,

how can i install the DirectSearch optimization package for mac version (MAPLE 16)? i

i have the files from maple 15.

Gil

It's frustrating that Maple 14 evaluates this integral to be 0: 

int(sqrt(-8*cos(t)*sin(t)+5),t=0..2*Pi);

( The integrand is positive over the interval.)

This equivalent integral is evaluated correctly in terms of EllipticE:

int(sqrt(-4*sin(2*t)+5),t=0..2*Pi);

Hi

I am trying to compute the value of a complex integral with higher precision, but if I increase the number of significant digits the value is not computed. Are there any approaches that can give me higher precision?
Residue calculus does not appear to be an option but as the exponents are not necessarily integer.

The problem is the following:

int_C(phi(z)*exp(-l*z))intd z

where C can be parametrized by t->mu+t+c*I*t for t=0..infinity, mu and l is real.

Hello,

 I want to plot the following truncated powr series with trigonometric coefficients:

sum(-y2*y3+8*(-1)^((k-1)*(1/2))*sinh(y2*Pi*k)*sin(k*Pi*y3)/(Pi^3*k^3*cosh((1/2)*k*Pi)), k = 1 .. 10)

but I get some strange terms with a strange term "I" in it which causes strange plots. I removed and it seems ok, why does this happen and what can I do to avoid it?

Question.doc

Can you make geometric figures that hold a particular area within a given perimeter of 12 matches

My attempt was to start at origin 0,0 and move up 1 unit (a,b) and then 1 unit up or to the right (c,d) etc ... until you enclose the required area (defined by linear spline) s.t. perimeter =12. but it doesn't really work

Consider the planar region bounded by the curves y=x^2 + 4x + 6, x=1 and y=2. Rotate about the line x=3 

i want to display a1,a2,a3 on one side and b1,b2,b3 on another sides  that is in an array (one side a1,a2,a3 graph and another side b1,b2,b3 graphs)

 my codes are 

a1:=plot(x^2,x=1..2);a2:=plot(x^2,x=3..4);a3:=plot(x^2,x=4..5);
b1:=plot(x^3,x=1..2);b2:=plot(x^4,x=1..1);b3:=plot(x^5,x=1..2);

A:=([a1,a2,a3])

B:=([b1,b2,b3])

with(plots):display([A,B]);

Hi 

I want to plot:

plot(int(x^2*e^(PI*x/10^12 M), x = 0 .. infinity))

where M is 10^8 but i want the units of the x axis to be x/M, is this possible if so please can i have some help.

Hi all,

There is a state space system as follows:

X_dot = A.X + B.U

Y = C. X

The transfer function of this system is

H(s) = C. (sI-A)^-1.B                 (1)

H(s), that is calculated in Maple by using the formula (1), is very complex (please see the attached file).

Would you please show me how to find the transfer function of the system? 

In addition, how to plot its bode plot?