Advanced Search

Maple 12 Questions and Posts

These are Posts and Questions associated with the product, Maple 12
View all posts
Maple 12 Questions and Posts Feed

How to guess which physics data suit to theorem eq...

Asked by: LeeHoYeung 535
physics geometry
November 22 2019
0  0

If maple can auto discover derived equations, 

then most variable are unknown name which may or may not be physics variable.

so, how to guess which physics data suitable for these look like meaningless variable?

or these tools only visualize the relationship of existing known equations?

matrix eigenvalues...

Asked by: Lali_miani 70
eigenvalues
November 17 2019
0  3

can anyone help me to calculate the exact  value of the eigenvalues of this matrix:
 

Download mat.mw

 

Why does my procedure not work?...

Asked by: LeeHoYeung 535
diffalg regularchains prem
November 15 2019
0  1
with(RegularChains);
R := PolynomialRing([x, y, z]);
p1 := x^2+5-2*x*z;
p2 := z^3*y+x*y^2;
p3 := -8*z^3+3*y^2;
F := [p1, p2, p3];
MainVariable(p1, PolynomialRing([x, y, z]));
MainVariable(p1, PolynomialRing([z, y, x]));
prem(p1, p2, x);
prem(p2, p1, z);
prem(p3, p2, y);
premcustom := proc(Fparam,Gparam, xparam)
local R, G, F, lcg, lcr, dr, dg:
R := Fparam:
G := Gparam:
F := Fparam:
if degree(G,xparam) = 0 then
 print("return 0"):
 return 0:
elif degree(F, xparam) < degree(G, xparam) then
 print("return R"):
 return R:
else
 lcg := coeff(G, xparam, degree(G, xparam)):
 dg := degree(G, xparam):
 while degree(R, xparam) > degree(G, xparam) do
  lcr := coeff(R, xparam, degree(R, xparam)):
  dr := degree(R, xparam):
  R := lcg * R - lcr * G * (x^(dr - dg)):
 od:
end if:
return R:
end proc:
coeff(p1, x, degree(p1, x));
coeff(p2, x, degree(p2, x));
prem(p1,p2,x);
prem(p2,p1,z);

premcustom(p1,p2,x);
premcustom(p2,p1,z);
 
why premcustom looping?
 
is this coeff(p1, x, degree(p1, x)); wrong ?
 
should this to get real coefficient in number instead of variable and how?
 
is there equivalent function as dprem?
 
with(diffalg):with(diffalg):
FlessThanG := proc(Fparam, Gparam, PRing)
F := Fparam:
G := Gparam:
if leader(F,PRing) < leader(G,PRing) or (leader(F,PRing) = leader(G,PRing) and degree(F, leader(F,PRing)) < degree(G, leader(G,PRing))) then
 return True:
else
 return False:
end if:
end proc:
dprem := proc(Fparam, Gparam, x, PRing)
local R, theta, thetax, thetaG, F, G;
F := Fparam:
G := Gparam:
R := F:
thetax := leader(G, PRing);
while FlessThanG(R, G, PRing) or FlessThanG(G, R, PRing) do
theta := leader(R, PRing);
R := prem(R, thetaG, theta)
od:
return R:
end proc:
R := differential_ring(ranking = [[x,y,r]], derivations = [t], field_of_constants=[m,l], notation = diff):
p1 := m*x[2] + r*x;
p2 := m*y[2] + r*y - g;
p3 := x^2 + y^2 - l^2;
dprem(p1, p3, x, R);
 
 
is x[2] = diff(x,t$2) in diffalg ?
 
if not how to write in this way?
 
i had defined constant
but got error
 
Error, (in DifferentialAlgebra:-Tools:-LeadingDerivative) unknown symbol (approx. error location: [m*x[2 --> ] <-- +r*x])
 
 

How to find recurrence relation for this?...

Asked by: LeeHoYeung 535
recurrence
November 11 2019
0  0

https://math.stackexchange.com/questions/301068/how-do-you-find-a-corresponding-recurrence-relation-for-some-random-algorithm/301709

according to this link, how to parse or walk through the algorithm in maple to generate recurrence relation formula?

how to convert a function and differential system ...

Asked by: LeeHoYeung 535
matrix transition
November 01 2019
0  1

how to convert a function to transition matrix?

how to convert a differential system to transition matrix?

 

Saveplot function not refresh in for loop call...

Asked by: LeeHoYeung 535
export plotting
October 26 2019
0  2

I search saveplot and sleep function here

i had kept close filename function and move plot setup default to first line

but thread no sleep in maple 12

then I remove sleep and can save image file

but after I call it in a function and run a for loop for this function

the file is not updated after sleep 3 seconds 

how to run a for loop call it and it can refresh 

Lyapunov function ...

Asked by: Zeineb 540
parameters lyapunov
October 16 2019
0  0

 Dear all

Is there a nice idea to determine the Lyapunov function of the following system

Lyapunov_function.mw

Some parameters used in the code:

b fixed parameter

a any parameter in R

Many thanks for your help

 

 

How to fill in missing data with statistics?...

Asked by: LeeHoYeung 535
statistics distribution
October 13 2019
0  3

If I know the direction of up and down

how to control normal distribution to fill in missing data to the direction I want in maple?

just like fill in missing pixel in bitmap file.

system of ODEs: stabilizing feedback...

Asked by: Zeineb 540
October 11 2019
0  0

Hi all;

I need to compute the stabilizing feedback for the system of nonlinear ODEs

stabilizing_Feedback.mw

 

Many thanks for your help

Which Bernstein has these result?...

Asked by: LeeHoYeung 535
limit
October 05 2019
0  0

Second terms coefficient = 2/3*x when (....)^2

9/16*x^2 when (...)^3

64/125*x^3 when (...)^4

625/1296*x^4

Which Bernstein has these result?

Which limit function of x^n = (n^(n-1))/((n+1)^(n-1))*x^(n-1)?

how to find and calculate?

 

 

Variable disappear after read file and create thre...

Asked by: LeeHoYeung 535
read
October 04 2019
0  1

Variable disappear after read file and then pass parameter to create thread

 

How i can convert this mathematic code to maple...

Asked by: Dr. Abdel-karrem Alomari 5
mathematica import
September 28 2019
1  0

How i convert the following mathematica code to Maple

f1[t^m_] := Gamma [m + 1] t^(m - a[t]) /Gamma[m + 1 + a[t]];
f1[t] := Gamma [2] t^(1 - a[t]) /Gamma[2 + a[t]];

f1[p_Plus] := Map[f1, p]
f1[c_*f_] := c*f1[f] /; FreeQ[c, t]
f1[c_] := 0 /; FreeQ[c, t]

f1[x^2*t^2 + t + x]

gives

t^(1 - a[t])/Gamma[2 + a[t]] + (2 t^(2 - a[t]) x^2)/Gamma[3 + a[t]]

How to plot y=0?...

Asked by: LeeHoYeung 535
plot
September 28 2019
0  2

Plot([x^2, subs(x=0, 2*x)], axis[1]=[color=white]);

can not find the y=0 this red line

how to plot y=x^2 and x = 0 on the same graph to show the slope at x=0 ?

How to derive to limit definition?...

Asked by: LeeHoYeung 535
limit
September 28 2019
0  0

How to derive from n*x^(n-1) to limit definition ?

How to proof exp(x) is transcendental function wit...

Asked by: LeeHoYeung 535
homework proof
September 25 2019
0  2

How to proof exp(x) is transcendental function without using calculus?

1 2 3 4 5 6 7 Last Page 2 of 32