What's the simplest MAPLE command that would change

into

I have following expression.

There is one for yhat under "Roman Extended Lower Case", but for some reason there isn't one for x. Why is that the case? Am I missing something? Problably so. Please help. Thanks much.

Hallo,
with "textplot" one can get a horizontal text. Can man get an inclined text also, for example, along an vertical line?
thanks
jahn

I am a new user of Maple. Please tell me, why Maple can't sort : 1+sqrt(3) and 1-sqrt(3) ?
Thankyou !

Im trying to author a maplet which executes numerical integration on a function for an interval. Here is what I have so far.
This is a the part of the assignment that didn't require maplet format. (This part I got to work)
restart;
a:= 1; b := 3;
f:=x->100/x^2*sin(10/x);
L:=[];# which is list of lists
ListOfEndPts:=[b];
found := false;
MaxNoPasses:=70;
tolerance:=1.0e-4;
simpAB:=evalf(student[simpson](f(x),x=a..b,2));app:=0;
for PassNo from 1 to MaxNoPasses while not found do
print("**********************************************");
middle := (a+b)/2.0:
print(`Pass number` = PassNo);

Hello
Is there any possibility to check how long solve will need for a solution?
I have to solve a littlebit complex equation set, so solve seems to need a little longer than usual.
In my case I have tryed it for about 2 hours .. than I had to turn of my notebook.
If it would be possible to check if solve would work for month, weeks, days or hours it would be a great help.
us rene

Hi. I tried to solve some excersices but with this one I've got a little problem. I was asked to calculate the area of a circlesegment with radius R and midpointcorner 2*alpha. I have chosen the straigt side of the circlesegment to be parallel with the y axis.

I get these formulas in polarcoördinates.

oppp:=Doubleint(integrand(pool),r=R*cos(alpha)/cos(theta)..R,theta=-alpha..alpha);

alpha R

/ /

| |

oppp := | | | r | dr dtheta

| |

/ /

Hi,
I've solved a system of nonlinear equations by hand, but I'm not sure if my answer is correct. I would like to verify my results with maple's output.
However, I am having some trouble using maple:
Here's my code:
> eq1:=2*(x*r) + 2*(y*s) + 2*(z*t)-(t^2) + (r^2)=0:
> eq2:=3*(x*(r^2)) + 3*(y*(s^2)) + 3*(z*(t^2))-(t^3)+(r^3) =0:
> eq3:=4*(x*(r^3)) + 4*(y*(s^3)) + 4*(z*(t^3))-(t^4)+(r^4)=0:
> fsolve({eq1, eq2, eq3});
Error, (in fsolve) number of equations, 3, does not match number of variables, 6
where r, s, and t are coefficients/constants and x, y, and z are variables.

Hello all,
I'm looking into visualizing/solving the Lotka-Volterra equations in Maple 10. In doing so I've run into a few problems:
1) When executing the following commands
```
> odeqs:= {diff(N(t),t) = a*N(t) - b*N(t)*P(t), diff(P(t),t)=c*N(t)*P(t) - d*P(t)}:
> # Growth rate of prey
> a:= 3;
> # Predatation rate
> b:= 2;
> # Growth of predators as a consequence of predation
> c:= 1;
> # Mortality rate of predators
> d:= 1/2;
> # Initial Conditions
> initConds:=[N(0)=(5/3),P(0)=(10/9)]];
>
> # Display number of prey as a function of time
> DEplot(odeqs, [N(t),P(t)], t=0..100, N=0..7, P=0..7, initConds,
```

Is it possible to plot a parameterfunction in Maple?
Something like:
x:=t^2-1;
y:=t^3-t

I use:
min_v, max_v := rtable_scanblock (cc_matrix, [rtable_dims (cc_matrix)], 'Minimum', 'Maximum');
min_v, max_v := 0., 0.995879045499999948
and get a min and max value.
My Question is how can I get the index of my max value from my Matrix cc_matrix?

Hi, I am trying to plot a chart where I have used textplot to define the x-axis. I only want the y-axis to show, but can't work out how...
Any ideas?

I have a 2nd-order differential equation dEq and a set of initial conditions initC. I solved the equation by:
soln := dsolve({dEq, initC}, numeric)
the solution should be in the form r(theta) = blah blah
Now I want to plot a graph of theta and r so I used
with(plots);
polarplot(soln, theta = 0 .. 2*Pi);
which didn't work out!! I don't know what might be the problem.
Please help
thanks

Is it possible to plot a second-order differential equation without specifying the initial conditions?