Maximizing a function
Hi there,I am trying to maximize a function given a set of values to a parameter in the function. The function is an differential equation belonging to a system of two differential equations.I have a...
View ArticleHow to find a single numerical solution to underspecified system of equations?
I'd like to know how to ask Maple to find numerical solutions to underspecified systems of nonlinear equations. For example, suppose I had a system of equations like this:eq1 := y1 = tanh(x1);eq2 :=...
View ArticleSolving a piecewise differential equation system
Hi there,I've got the following differential equation system:,dU/dt = delta·dotD -lambda·U - kappa·U^2dL/dt = (1-phi)·lambda·U + 1/4 ·kappa·U^2being phi, delta, kappa, lambda, kappa some fixed...
View Articlesolving systems of equations
I'm given the following two equations:x^3-4x=y, y^3-4y=xto solve the system, I've just usedeqns:={x^3-4x=y,y^3-4y=x};vars:={x,y};solns:=solve(eqns,vars);and have obtained only four solutions when I...
View ArticleHelp with differential equations
Hi all, It's been a while since I have used Maple. To be honest I haven't used it for over six years. I am trying to solve simple differential equations, however I have many issues. I am trying to...
View ArticleI have a problem solving PDE numerically.
I have a problem solving a system of PDEs.The system of PDEs arePDE01 := -(l^2+1^2)*(diff(v(l, t), t))+(l^2+1^2)*(diff(R(l, t), l, l))+4*l*(diff(R(l, t), l))+4*l*v(l, t)/(l^2+1^2)^(1/4)-6*R(l,...
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pdsolve/Solve for derivatives algebraically (without integrating)
Hi,    I have a question regarding pdsolve, or Solve from the PDEtools package. I have a set of equations relating partial derivatives, and I'd like to isolate certain terms without explicitly known...
View ArticleError, (in dsolve/numeric/process_input) unknown y[2] present in ODE system...
Hi, I'm trying to solve a system of equation and I keep getting this error. Could anyone help me figure out what I'm doing wrong? My problem is:> alpha := .3; G := 3.5; L := 6; f := 1.1;for i to 50...
View ArticleError, (in plot) two lists or Vectors of numerical values expected
Hey there,I've a numerical solved system of differential equations, which depend on one argument and one index. I can solve it, but when I try plot it I have this error: Error, (in plot) two lists or...
View ArticleHow to determine unknown value in boundary condition
Hello everyone,How can unknown values in boundary conditions of system ODEs be determine by using shooting technique. See the work sheet here Sht.mwThanks.
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Solution of a system?
Cheers!I'm having a problem with my student work, about to have a solution of 6 equations... Can help me in this file? i dont know how to solve this... this had-me a null solve...  Thanks for the help...
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Tackling a PDE system
Hello All,I have the PDE system shown below. It is a simple system for 2 unknown functions f1(x,t) and f2(x,t). Also, say we have x=x(t)=e^t for example. How does one solve such PDE system with Maple?...
View ArticleNumerical Solving of System
Hi dear friends Is there an interactive package management utility or a way for solving following problem?for m>=4 It dosent work!restart:Digits :=30: m := 3: g :=0.3: nu := 0.2: a := 1:w :=...
View ArticleHow to draw DEplot3d
and show whether there is sink or source?ode1:=a(t)*(diff(a(t), t))+c(t)*(diff(c(t), t))=3*t;ode2:=a(t)*(diff(a(t), t))+a(t)*(diff(a(t), t))*b(t)*(diff(b(t), t))*c(t)*(diff(c(t),...
View ArticleNumeric solution of certain system
hi.may  help me for solve this nonlinear equations by numeric solver maple39.d39.pdfocx39.pdfthanks alotfile format is pdf and word typeÂ
View ArticleSolving a big system of inequalities
Hello,I have a problem with MAPLE. I would like to solve a system of 18 inequalities with 4 variables. The variables shall be rational numbers. I should also mention that I am not sure if the system...
View ArticleMaximizing a function
Hi there,I am trying to maximize a function given a set of values to a parameter in the function. The function is an differential equation belonging to a system of two differential equations.I have a...
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Problem with system of equations
HiAnyone could help me in solving the following system of equations to get constants C1, C2, C3 and C4. MALPE give me this "soution may have been lost".  The MAPLE sheet is also attached. >...
View ArticleSolve command returning incorrect values
I am attempting to solve a system of second order ODEs. I place conditions on the solutions and use the solve command to figure the correct constants for the general solutions of the ODEs; however, the...
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IBS incorrect. How to write?
There is a desireto explorethe processof filtration combustion.To do this,you mustsolve a system ofdifferential equationsin partial derivatives.I write down allthe equations.Boundary conditionsinMaple...
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