I meet a problem in the use physcis package.

    for example,

                                   restart;  with(Physics); Setup(mathematicalnotation = true):

                  ...

Law of Hess and heats of dissolution in acid.^б-в Х, КХ

In 298.15 º K are set following the dissolution enthalpy of these compounds in HCl:

B₂O₃.3CaO           -344.86 kJ/mol,

B₂O₃.2CaO           -210.40 kJ/mol,

B₂O₃.CaO  ...

I'm currently using Maple to plot a 2-D (x,y) function F(I) that, at each point, is a function of a nasty integral, I(x,y,t)dt between -infinity and some constant. Maple does a good job of plotting the data and the resulting plot looks fine. The trouble is that when I ask Maple to just evaluate F for a single (x,y) rather than over the full range of (x,y) it tells me that it is not analytically tractable and it cannot produce a result.

If this is true, then how on EARTH...

Hi,

I have the following problem, I have a random matrix 50×50 and I want to permute the columns in such way that the number of non-zero elements under the diagonal would be minimal. Is there any function in maple which can do this? Or should I write an algorithm my self?

Hey guys, 

Its my first post, so please be lenient. I have done an internship at a theoretical physics department and part of my work was to plot a particular only numerically solvable integral over time (problem from Quantum Mechanics). I wrote a maple code and made it work, but it only produces results for certain values and even for those it takes more than one hour to plot one graph. Since this is my first big project written in maple, i assume, that the code...

I solve system of ordinary differential equations numerically by method=rkf45 (Runge-Kutta Fehlberg method).

1. Maple 13 installed on the Linux x64. Processor – AMD Phenom (4 cores). When Maple computes it uses only one core but other three cores stand idle. How to impel to compute other cores?
2. When I solve system of ODE a calculation reaches closely 1 ns and stops. Maple writes that value of Maxfun exceeded. But I need solve system up to 10 μs....

please i want to write the maple programme  for solving y^/ =y, y(0)=1, 0≤x≤1 with h=0.1 using the following three schemes simultaneously:

1. (7/12)y_n+1 - y_n+1/2 +5/12y_n =(h/12)f_n+2

2. y_n+2 - (4/3)y_n+1 +1/3y_n =(2h/3)f_n+2

3. y_n+1 -y_n =hf_n+1/2

Hello,

I would like to create a model of a sinngle pendulum with Maple 13

I began but I cannot manage to animate it

Here is what i have already written:

pendulum:=proc(l,initialAngle,initialSpeed)

local eq,sol,angledata,x,y,plotseq

eq:=diff(θ(t),t,t) + 9.81/l sin(θ(t)) = 0;

sol:=dsolve({eq,θ(0)=initialAngle,D(θ)(0)=initialSpeed},θ(t),numeric);

I am trying to get the equation of a line. I have a buch of points and need the equation of a line going through those points. I am making computer program that can finde the y value of any point on the line with the equation I'm trying to get and an X value.

So, I have some points,..

I can get the graph,..but not the equation for that graph...

Is this posable,...?? I can't seem to find out how...

Thank you!

(I put in the points Im using just as are ference)

ifplease how can i factorise in powers of (x-x_n), the expression  y(t):=(1/3h²)[(-x+x_n+h)(-x+x_n+3h)]y_n+(1/3h²)[(-x_n+x)(-x+x_n+4h)]y_n+1 -(1/3h)[(-x_n+x)(-x+x_n+3h)]_fn+2?

i was trying to familiarize with maple 13 but encountered this. pls how may i go out from here?

> with(Student[NumericalAnalysis]);
> DE1 := d*y(t)/dt = y(t)-t^2+1;
                           d y(t)           2   
        ...

I am trying to solve the the differential equation. for this I have written the following program. But it is showing the error.

restart

with(plots)

eq := diff(x(t), `$`(t, 2))+326.1*(diff(x(t), `$`(t, 1)))+3190*(diff(x(t), `$`(t, 1)))^2-37500*sqrt(x(t)*(0.165e-2-x(t)))+2.825

BCs := [x(0), x(0.2e-1)-0.15e-2]

sol := dsolve({BCs, eq}, {x(t)}, type = numeric)

Maple is saying:

Error, (in dsolve/numeric/process_input) system...

Hi!

I'm sure there is a simple solution to my problem, but because I'm fairly new to using Maple, I can't figure out why my graph won't work. All I'm trying to do is graph a function along with its first and second derivatives within the same graph. The original function is f(x)= (2+sinx)^x²/(x²+1).

I defined the function as f and then found the first derivative by using df:=D(f...

 Hi hi,

I've been sourcing various codes to help with plotting gaussian primes. I've managed a plot of gaussian primes within a given range with no problem at all. However, I'm looking now to make a plot of all gaussian primes connected by a step k or less to help communicate the Gaussian moat problem.  ( similar to figure 2 in http://mathdl.maa...

Download Maple_primes_ques_27.mw