Hi everybody, Using pdsolove(SyPDE, BIC, numeric), I have to model propagation of two waves , u(x,t) and v(x,t) , in two elastic test rods, that are in contact. The MAPLE problem are boundary conditions at the contact surfaces: values of forces and strain are equal at the first rod right end and at the second rod left end: D[1](u)(l_1,t)=D[1](v)(0,t) and (u)(l_1,t)=(v)(0,t) Maple can't do that. Should I put in code some transitional Maple expression or function of force and strain, like, for force X:=(δ*x)/l, in order to get this:

Hi all,

I would be very happy if someone could help me with this one.

I'm trying to solve for an equilibrium of two functions u and U:

u:=ln(y-p*a-g*m)+(1/(M+m+1))*ln(1-l+e*a)

U:=ln(Y-P*A-G*M)+(1/(m+M+1))*ln(1-L-E*A)

where a,m are the variables of u, A,M are the variables of U, and y,Y,p,P,g,G,l,L,e,E are parameters. All variables and parameters are nonnegative.

I am wondering how one would convert a float to a string in fixed notation instead of scientific.

I have a Maplet that I would like to set a textbox to a value obtain from a funciton that returns a float

It's for a stop time on an animation,

so I have Evaluate('t_stop'='decay_time('h')') in my Maplet code... but it returns it as scientific notation e.g. 1.234E-1 for 0.1234

I would like to return a string of 0.1234

I have tried using a: = convert ( 0.1234, float 4), convert (a,string), but that still remained as scientific notation...

I'm dealing with a analysis of a mechanical mode with maple12,but I got blocked with ploting a function for a long time.Could you help me with it?Thanks a million!

the expression is below:

arcsin((2.*(22.*RootOf(-73-55*sin(theta[1])+2*_Z^2, label = _L3)+10.*RootOf(-73-55*sin(theta[1])+2*_Z^2, label = _L3)*sin(theta[1])-73.-55.*sin(theta[1])))/(73.+55.*sin(theta[1])));

when ploting that,it appears:Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct.

I define a procedure function like this

f:=proc if 0<=x<1 then 1 else 0 fi; end proc

but when i want to integral it

int(f(x),x=0..2)

maple gave me the information like this

Error, (in g) cannot determine if this expression is true or false: 0 <= x and x < 1

I want to know why? and I know use piecewise function can solve this. but  I think is there any other method to solve it?

Hi, I am currently enrolled in a class which uses Maple 12.  I have looked through all the FAQ and Help topics by using their search functions.  I still not have the command to find the Domain and Range of a function.  Advance thanks for any help which is appreciated

Hello,

I need to export animation as a gif picture with different speed of animation.

I use plotsetup(gif,  ... but I do not know how I could do it.
 

Please help me.

Thanks

Vladimir

Hello Folks ! I'm running Maple 11 on Mac OS X Leopard (latest version 10.5.6). I've found what I think is a bug in Maple: when doing operations on large polynomials, like multiplication or factorization, the result is correct, but some ghost exponents show up on fractions or even plus/minus symbols. In the file I've attached you will see this in the last two results, in which a 4 exponent shows up over the 1/8 and +/- signs or even over some parenthesis. Maple doesn't seem to get confused wi

Hi,

I'm trying to extract some coefficients from a symbolic determinant but it's not working. I tried every option presented on Maple help but couldn't get it to work:

1. How set these varibles and unknowns ?

for example

q := {l2s = n+l2[0], ds = k+d[0], l1s = m+l1[0], m+n = k}

I just want know the ds expressed with the varibles: d[0], l1[0],l1s,l2[0],l2s

How ?

solve(q, {k, ds}) and solve(q,{ds})

doesn't work.

 

2. Another question. If I get the result sets {a=..., b=... }, how can I get the expression of a or b. As we know, the sequence of the a and b in the set is not allways the same way. It may be {b=..., a=...}

graph the vector field F and the curve C to guess whether the line integral of F over C is positive or negative or zero. then evaluate the line integral F(x,y) = (x/sqrt(x^2+y^2)i + (y/sqrt(x^2+y^2)j C is the parabola y =1 +x^2 from (-1,2) to (1,2)

plot the gradient vector field and the contour map of f f(x,y) = sinx + siny

can anyone help me to plot that vector field of F(x,y) = (y^2 -2xy)i + (3xy -6x^2)j

the cylinder r = a*cos(O) cut out of the sphere of radius a centered at origin. any help. thanks