Items tagged with implicit implicit Tagged Items Feed

I have two parametric equations, one for x(t), one for y(t).  Both are ODEs of order 1.  Both are implicit.  There is no way to solve explicitly for dx/dt or dy/dt.  How can I get Maple to do a plot of the solution?  I tried DEplot but apparently it demands an explicit presentation of dx/dt and dy/dt.   I have Maple12 on a Mac, but could use Maple15 on a server.

can you help me about multiplication :

when I type a multiplication in Maple 15, Can I skip the multiplication sign between two variable?

for example : instead of type  x*y , could I type xy ?

How it works to be so fast?

impl_plot.mw

Is it somehow related to other wonderful tetralogy:

http://www.mapleprimes.com/posts/95845-Generating-Samples-From-Custom-Probability-Distributions-I?

Implicitplot

When I use the solve command in Maple15 nothing happens. I just want to solve for V and Cf.

Does maple not like implicit equations? The file is attached

b) Define a procedure f(x, y) which returns −1 if x < y and 1 if

Dear guys! I want to solve a system of ODEs but I have some problems. Plaese have a look and let me know:

> Omega_m0 := 0.22: Zeta_m := 10^(-4): n := 0.35: h := 0.63: omega := 1:

> eq := z-> 1 = H^(2*n-2)*(1-Omega_m0)/(h^(2*n-2)) + h^2*Omega_m0*(1+z)^3*(1+Zeta_m*exp(-2*psi(z)))/(H^2) + omega*H^2*(1+z)^2*(diff(psi(z),z))^2/(6*h^2);

> yp := implicitdiff(eq(z), H, z);

> ode1 := diff(H(z),z)=subs(H=H(z),yp);

> ode2 := H(z...

I've seen a few posts regarding implicit functions in Maple, but I've not seen any that can help my case...

(I should point out that I am new to Maple as well).

My function is h_c=[1/(2π*(√2)*a*f²)]*ln(h_c/4), and f=(a0-a)/a0

I have managed to get so far- Maple has accepted the function as an equation, and I want to plot h_c as a function of f, which, as you can see, varies according to a. I've tried...

I am having a problem with variable assignment.

output 15 should be:

test :=[1]

[2]

[1 1]

At some point, the array test is being overwritten even though in my proceedure I use only local variables.

Robert Israel helped me to plot  F2 vs k 

http://www.mapleprimes.com/questions/120380-Explicate-Plotting

I tried to modify his code to get reults for F2 vs S from equation A1, but i am still facing problems with it

The maple code is

restart:with(MultiSeries):with(plots):

parvalues:={C=2.02,H_liq=8.74,R=22.11,R1=0.0006};...

restart:with(MultiSeries):with(plots):

parvalues:={C=2.02,H_liq=8.74,R=22.11,R1=0.0006};

G:=R3*k*(1-R1)/(C*Pec_i);

F1:=1/(R*S+1-S);

F:=F1*(1-R*G*S);

F2:=Pec_i*F;

A1:=Theta0/C=(exp(F2*(1-S))-1)*(H_liq+1/(1-exp(-C/k*F2*(S))));

R3values:= [0,-1,-3,-4]; colours:= [red,blue,green,black]; display([seq(plottools[transform]( unapply([k, subs(parvalues, Pec_i = -20, R3=R3values[i], F2)], (k,S))) (implicitplot(subs(parvalues,Theta0=4,R3=R3values[i...

of the implicit function 8*x^3+y^3-6*x*y-3=0 with Maple?