Maple 2017 Questions and Posts

These are Posts and Questions associated with the product, Maple 2017

I entered this function
f:=x->(4*x^2-4)^(4/5);

Then I entered f(0) and got (-4)^(4/5).

When I tried to approximate , I got -2.452480922+1.781831689*I

I am looking for the real number value, which is 3.031433 with my TI-83 calculator and here https://www.desmos.com/calculator/b1soxuhbri

How do I set it in maple so that x is assumed to be real in f(x) and all outputs are real.

Hello! I am trying to make an if statement that is IF a bound is not equal to NULL, it does things, and if it IS equal to NULL, the bounds are set to zero. When a bound is null, they say 

bound1:=()

My first if statement will not work, please help!

 

bound1:=solve(tau(x)=(Intv||j)[1],x,useassumptions) assuming (Intv||i)[1]<=x<=(Intv||i)[2] ;  

bound2:=solve(tau(x)=(Intv||j)[2],x,useassumptions) assuming (Intv||i)[1]<=x<=(Intv||i)[2];

if bound1<>NULL;bound2<>NULL;  then

if bound1<=bound2   then  

lower:=bound1;  upper:=bound2  

else lower:=bound2;   upper:=bound1 end if;

else lower:=0; upper:=0 end if;

I was using the following idea to get the computation time of my computations in Maple;

s:=time():
my computation
print(time()-s);

But it seems if I use

Grid:-Map(m->My computation(m),[some sequence]);

Where the sequence has more than one element, this idea doesn't work! It seems Maple time() remains fixed during this Grid:-Map when the sequence has more than one element. So then how should I check the computation time?

In the following pictures you can see when the sequence has one element, it works normal, but when it has two elements, it doesn't work the same.

Please house, I need help on how to compute a funtion a set of column data imported into maple and subsequently output results in a new column on the table.

I have successfully imported the table data from excel but I needed to write a code to recognize the column/columns I want to use as variables in the function and compute results using the column's data. Data table holds up to 14 x 25 datasets.

Any advice would be well appreciated.

Hello everybody,

I am quiet new to Maple and just have to program a small tool.

I need to show a conculison in a pop-up Window which should contain a matrix and a plot.

I tried different ways but they didn't work.

Thanks in advance

Hello,

it seems that Maple2017 handles the noncommutative product wrongly (while it used to do it properly up to maple 17 afaik). 

 

CODE:

with(Physics);
Setup(noncommutativeprefix={P,Q});
Q^2*P*Q + Q*P*Q^2;
simplify(%);

 

gives a correct result: BUT 

Q(t)^2*P(t)*Q(t) + Q(t)*P(t)*Q(t)^2;
simplify(%)

 

gives the result:

2Q(t)^3*P(t)  (which is wrong).

It used to work fine in Maple 17. I need to differentiate noncommutative polynomials in P(t), Q(t), which was done without problem in Maple 17 but now seems to be broken. 

 

Any explanation/workaround/fix? Is it fixed in Maple 2018?


 

restart

Digits := 4

"phi(x):=16*x^(2)*(1-x)^(2):"

``

a1 := int((diff(phi(x), x, x, x, x))*phi(x), x = 0 .. L)

(6144/5)*L^5-3072*L^4+2048*L^3

(1)

``

a3 := int(phi(x)*phi(x), x = 0 .. L)

(256/9)*L^9-128*L^8+(1536/7)*L^7-(512/3)*L^6+(256/5)*L^5

(2)

``

lambda := 0.170e-1

0.170e-1

(3)

B := 0.223e11

0.223e11

(4)

A := 0.346e11

0.346e11

(5)

k[n] := W*(4*R*G*L^2+pi^2*(2*n-1)^2)/(C*(pi^2*(2*n-1)^2+4*R*L^2*(G+W)))

W*(4*R*G*L^2+pi^2*(2*n-1)^2)/(C*(pi^2*(2*n-1)^2+4*R*L^2*(G+W)))

(6)

b[n] := 4*pi*(2*n-1)/(4*R*G*L^2+pi^2*(2*n-1)^2)

4*pi*(2*n-1)/(4*R*G*L^2+pi^2*(2*n-1)^2)

(7)

U := Heaviside(t)

Heaviside(t)

(8)

w := 1

1

(9)

L := 3.5

3.5

(10)

Ra := 9

9

(11)

Rb := 5

5

(12)

W := 1

1

(13)

G := 0.5e-3

0.5e-3

(14)

R := Ra+Rb

14

(15)

C := 0.2e-1

0.2e-1

(16)

h := 0.250e-1

0.250e-1

(17)

nu := .22

.22

(18)

I1 := (1/3)*w*h^3

0.5207e-5

(19)

E[0] := A+B

0.569e11

(20)

nu1 := (1-nu)/((1+nu)*(1-2*nu))

1.142

(21)

"beta(x,t):=1/(w*h)(W(&sum;)(-(Pi^(3)*b[n]*(2*n-1)^(3))/(k[n]*8*L^(3))*cos(((2*n-1)*Pi)/(2*L)*x)*(exp(-k[n]*t)))+(R*G*(R*G)^(0.5)*sinh((R*G)^(0.5)*(x-L)))/(cosh((R*G)^(0.5)*L))*t+C*U*(R*G*(R*G)^(0.5)*sinh((R*G)^(0.5)*(x-L)))/(cosh((R*G)^(0.5)*L)))*exp(-W/(C)*t)"

proc (x, t) options operator, arrow; (W*(sum(-(1/8)*Pi^3*b[n]*(2*n-1)^3*cos((1/2)*(2*n-1)*Pi*x/L)*exp(-k[n]*t)/(k[n]*L^3), n = 1 .. 8))+R*G*(R*G)^.5*sinh((R*G)^.5*(x-L))*t/cosh((R*G)^.5*L)+C*U*R*G*(R*G)^.5*sinh((R*G)^.5*(x-L))/cosh((R*G)^.5*L))*exp(-W*t/C)/(w*h) end proc

(22)

eq := -nu1*I1*a1*((1/2)*E[0]*q(t)+B*lambda*(int(exp(-lambda*(t-s))*q(s), s = 0 .. t)))+2*w*h^2*beta(x, t)

-0.4603e11*q(t)-0.6134e9*(int(exp(-0.170e-1*t+0.170e-1*s)*q(s), s = 0 .. t))+0.5000e-1*(-0.7235e-2*pi*(pi^2+686.)*cos(.4488*x)*exp(-50.*(.3430+pi^2)*t/(pi^2+686.))/(.3430+pi^2)^2-.5860*pi*(9.*pi^2+686.)*cos(1.346*x)*exp(-50.*(.3430+9.*pi^2)*t/(9.*pi^2+686.))/(.3430+9.*pi^2)^2-4.522*pi*(25.*pi^2+686.)*cos(2.244*x)*exp(-50.*(.3430+25.*pi^2)*t/(25.*pi^2+686.))/(.3430+25.*pi^2)^2-17.37*pi*(49.*pi^2+686.)*cos(3.142*x)*exp(-50.*(.3430+49.*pi^2)*t/(49.*pi^2+686.))/(.3430+49.*pi^2)^2-47.47*pi*(81.*pi^2+686.)*cos(4.039*x)*exp(-50.*(.3430+81.*pi^2)*t/(81.*pi^2+686.))/(.3430+81.*pi^2)^2-105.9*pi*(121.*pi^2+686.)*cos(4.937*x)*exp(-50.*(.3430+121.*pi^2)*t/(121.*pi^2+686.))/(.3430+121.*pi^2)^2-206.6*pi*(169.*pi^2+686.)*cos(5.834*x)*exp(-50.*(.3430+169.*pi^2)*t/(169.*pi^2+686.))/(.3430+169.*pi^2)^2-366.3*pi*(225.*pi^2+686.)*cos(6.732*x)*exp(-50.*(.3430+225.*pi^2)*t/(225.*pi^2+686.))/(.3430+225.*pi^2)^2+0.5616e-3*sinh(0.8367e-1*x-.2928)*t+0.1123e-4*Heaviside(t)*sinh(0.8367e-1*x-.2928))*exp(-50.00*t)

(23)

``


 

Download n-h-ie.mwn-h-ie.mw

Hello everyone,

 

I am currently trying to plot lines from different lists.

I got 3 lists with points and another 3 lists with points (Connect each point from one list with the other), and another list with my x-axis.

 

I tried something like that

(nply in this case is 4)

for i from 1 to nply do

sigma1P1[i] := display(line([grenzeu[i], sigma1unter[i]], [grenzeo[i], sigma1ober[i]])):

sigma2P1[i] := display(line([grenzeu[i], sigma2unter[i]], [grenzeo[i], sigma2ober[i]])): 

tau12P1[i] := display(line([grenzeu[i], tau12unter[i]], [grenzeo[i], tau12ober[i]])):

end do:
plot:-display(sigma1P1,sigma2P1,tau12P1);

The for loop creates 3 tables with 4 line plots, but the plot:-display(sigma1P1,sigma2P1,tau12P1);

gives me this Error message:

Error, `plot` does not evaluate to a module

Have anyone an idea how to get these 3 table with plots in one plots?

Plot_problem.mw

And if yes is it possible to implement this in a EMbedded Plot Window?

 

Many thanks in advance!

 

 

 

Dear all

I want to solve a set of parametric inequalities with constraints but it takes too much time to processing. do you know any faster solution? 
thanks in advance

Dear friends, i want to solve inequalities as follow:

solve({0 < Q, 0 < delta, 0 < t, 0 < E[0], 0 < lambda[1], 0 < (lambda[1]^2*(Q+2*t+4*delta-4*E[0])+lambda[1]*(Q+2*t+3*delta-7*E[0])-3*E[0])/((lambda[1]^2-6*lambda[1]-6)*t), Q < -(3*delta*lambda[1]+2*t*lambda[1]-4*E[0]*lambda[1]+6*delta-3*E[0])/lambda[1], delta < E[0]*(4*lambda[1]+3)/(3*(lambda[1]+2)), t < -(3*delta*lambda[1]-4*E[0]*lambda[1]+6*delta-3*E[0])/(2*lambda[1]), lambda[1] < 1, (lambda[1]^2*(Q+2*t+4*delta-4*E[0])+lambda[1]*(Q+2*t+3*delta-7*E[0])-3*E[0])/((lambda[1]^2-6*lambda[1]-6)*t) < (lambda[1]*(-2*Q-4*t-2*delta+3*E[0])-lambda[1]^2*delta+lambda[1]^2*E[0]+2*E[0]-2*Q-4*t)/((lambda[1]^2-6*lambda[1]-6)*t) and (lambda[1]*(-2*Q-4*t-2*delta+3*E[0])-lambda[1]^2*delta+lambda[1]^2*E[0]+2*E[0]-2*Q-4*t)/((lambda[1]^2-6*lambda[1]-6)*t) < 1})

But, processing is very heavy and takes too much time! is there any alternative solution?

Thank you in advance.

rho := -2*K*(s+K)^2*k[e]*sinh((s+K)*x/d)/(s*d^2*(4*(s+K)^3*cosh((s+K)*h/d)*h/d^2-4*K*(s+K)*cosh((s+K)*h/d)*h/d+4*sinh((s+K)*h/d)*K))

l.mw

All variables are constant except s and x

I just noticed something funny. If I use the left side tool of Maple to define a matrix with zero entries and then change some entries and take determinant, then Maple treats zeros as symbold!!!! If I have to define my matrix completely myself, then what is the use of this tool?

I want to compute the following supremum of the function.

I'll write in Latex code.

I have the following term which I want to estimate:

\delta_1(\epsilon):= \sup_{|x|<100}\sup_{ 0<= t<1/\epsilon} \epsilon \cdot |\int_0^t [ f(x,\cos s , \sin s , p_0(t)+q_0(s))-g(x,t)]ds|

where p_0(t) is an unknown function that depends on t alone.

f(x,y_1,y_2,z):=x+(y_1^2)*z

g(x,t):= \lim_{T\to \infty} 1/T \int_0^T f(x,\cos s , \sin s , p_0(t)+q_0(s))ds

q_0(s):= \exp(-s)(q_0(0)+\int_0^s (h(x_0(0),\cos(r), \sin(r))-p_0(0))dr)

where h(x,y_1,y_2):=y_1^2.

Can someone lend me a hand?

Thanks!

 

How to do a full reinstall so that no settings are kept?

I tried deleting the maple 2017 folder in program files after I uninstalled but that did not help.

Hi everyone 

I need help, I have downloaded Maple, and I have read about the student package, which can show the step by step solution, I would like to see the step by step solution than just a final solution to the equation problem. 

I have the maple 2017, but does anyone know, how to download this package, and use it in maple?

https://www.maplesoft.com/support/help/maple/view.aspx?path=Student%2FBasics%2FLinearSolveSteps 

There is several links to this, but I cant find it where to download the package, I hope that someone is able to help me 

 

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