Okay, So I'm running Maple 11 on a Mac with 4 gig of RAM. However my mserver keeps crashing due to running out of memory. The intuitive solution to this is obviously to increase the datalimit through kernelopts, when I try to do this I am informed that I can't exceed the hard limit, i.e.: >kernelopts(datalimit = 409601); Error, cannot raise the datalimit above the hard limit As we've already established I've got rather more memory available than that and it doesn't seem to be restricted by the unix kernel: ulimit -a core file size (blocks, -c) 0

How can I give the general solution to v''(t)+v'(t)+v=0, because I can only draw the solution. deq:=diff(y(x),x)=x^2+x+1; value(%); Thanks nevulosa

Any tips on how to solve fixed endpoint problems in the calculus of variations?

For instance,

Find the extremal for:

int(diff(x(t),t)^2/(t^3),t=1..2) with x(1)=2 and x(2)=17.

The correct answer is x(t) = t^4 + 1.

Hello I have a table of x values and y values and after plotting them I found a trend line by least square. But at the moment of plotting the values and the trend line, this last one doesn't reach all the plot width. How can I enlarge its reaching? Thank you,

hello, first post here.

i'm attempting to solve the 1 d heat equation using a finite difference scheme, with continous boundaries eg.

 

Where I can get right and complete instructions for read .txt files from Maple 7 ? 

I follow the instructions like:

L := ImportMatrix( "data.txt", delimiter=" " );

for read a deta.txt file, or others like fopen, etc, and do not get the data.

 

How do I plot in the simplex with Maple [11]?

I am working with variables x1,x2,x3, each non-negative, and summing to one.  Thus, the triangular 2-simplex is an easier environment to work in.

Thank you in advance,

Colin Rowat, Department of Economics, University of Birmingham

 

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Hello All,

Can I get maple to give me a hint as to what test for convergence to use with infinite series?

 

Thanks!

HI to all!

I've a math question about the Hessian Matrix. I know that it's used for clasify critical points of a 3-D function, but what happens if the Hessian is undefined (Hessian = 0) in a point?... How i can analyze the critical point?...

A particular sample is:  f(x,y) = (y-x)^2*(y+x).

The gradient vector of this function is: grad(f)= [ 3x^2 - 2xy - y^2 , -x^2 - 2xy + 3y^2 ]. To find critical points we have to do grad(f)=0 (vector). And in this case it's easy to verify that the critical points lie in the Y=X line.

hi

i have to calculate a extreme value for a box that is open on one side that should have a volume of 32.

V = x * y*z

For the surface ob the box-sides i used this function:

O = 2xz + xy + 2yz

my idea was to solve this in maple using lagrange because i ve a side condition

with(RealDomain):
L:=(x,y,lambda)->x*y + 2*x*z * 2*y*z +lambda*(x*y*z-32);
solve({diff(L(x,y,lambda),x)=0, diff(L(x,y,lambda),y)=0, diff(L(x,y,lambda),lambda)=0});
evalf(%);

it gives me for my values x = 32/x*y; y = y; z =z

Hello! I would like to know if there is a way that Maple finds the equation on its own. I have a table of x values and y values and after plotting them I would like to find a trend line by least square.

I would use the chain rule twice:

f(s,t) = e^u

u = sin(s*t);

u = sin(v);

v = s*t

v' = s;

u' = cos(s*t*)*s

f' = e^cos(s*t)*s

Maple adds *ln(exp), what's wrong with my way?

complete maple output: exp^sin(s*t)*cos(s*t)*t*ln(exp)

I want to create a list of the first 100 prime numbers.  I remember vaguely the use of seq and type but I can find it in the differents forums.  Could someone state it again for me.  thanks!

Hi,

I have a matrix

 

A:=<<1,-3,2>|<-2,6,-4>|<2,-1,5>|<3,1,8>|<-1,-7,-4>>;

 

how do I find a basis of im(A)?

Thanks

 

Chen