I have an ODE system called RedSys which is below and incons1 which is its initial condition.
When I want to solve this system by dsolve numeric with this command:
dsolve((convert(RedSys, set)union incons1), numeric, implicit = true);
I face an error which says :
system should be linear in leading derivative. However when check I do not see any non linearity.
could you please let me know what should I do to solve this system by dsolve/numeric?
Thanks so much,
I have a problem with the fact that maple not always knows the difference between pi and -pi. Try for example these three lines:
They have significantly different results where the line with the exp( - I*Pi) is interpreted as exp(I*Pi).
Is there anyway to avoid this?
I use maple 13
Thanks in advance
In a Maplet, how do I access an expression entered into a MathMLEditor to use as a Maple expression (to plot, evaluate, simplify etc.)?
Hi. I want to plot the function U in terms of x and y,
U :=2*diff(p(x,t),x)*diff(q(y,t),y)/(p(x,t) + q(y,t) + a)^2;
I used the solve command to solve for the unknown b , i do have the solution listed in the book...but when i try to solve it as follows
since maple takes values in radians(10 deg)
i get the message as "solutions may have been lost"
Am i doing anything wrong ?
This one is rather simple. Anyway I do not get the right way to do it.
I´d like to redefine showassumed and set it to zero.
Can anyone give me an example how to do it?
I tried the following:
X1 := RandomVariable(Binomial(n, p)):
DARA := t->piecewise(0<t,log(t),0):
0 < n, n::posint, 0 <= p, p <= 1:
g1 := simplify(%) = DARA(s);
k1 := solve(g1, s);
Does anyone know, why or when to use the assume command as opposed to just defining the assumptions?
instead of typing:
assume(0 < sigma);
i could just write:
0 < sigma;
I did the following:
HARA := t->(alpha+delta*t)^(1-(beta)/(delta)):
0 < (beta)/(delta), (beta)/(delta) < 1:
0 < (alpha+delta*t);
Now Maple prints the last assumption like:
0 < alpha*t
thus assuming that delta must equal 1.
Thanks for helping.
I am new to Maplet programming and came across this problem while looking trying to build a simple application. Running the code results in:
"Error, (in Maplets:-Tools:-CleanUp:-SetOption) the target `("REF")("enabled")` refers to a non-existant element"
I am at a loss for why this is the case. From what I read, I am doing this right, but if anyone can see the problem... I would appreciate the help.
I am not able to use colors flexibly in contourplot3d. So, I am trying another way to get my plot. But I am not exactly getting my result. This is what I am trying to do.
I need help with these three steps.
1) For Latitude from -10 degrees to 10 degrees and longitude from -30 degrees to 30 degrees,
I need to calculate aa:=1.4*cos(latitude)-2*sin(longitude).
2)The above value of 'aa' gives color. (eg. if aa<><><>3 color= red etc)
3) Then plot this point with color from step 2 at (x,y) given by
not being used to work with Maple, I cannot figure out how to solve the following problem.
I want to verify if the positive semidefiniteness of a given 20x20 matrix A (depending on 10 real variables x_1, ..., x_10) implies the positive semidefiniteness of another 4x4 matrix B (depending on the same 10 variables). The entries of each matrix are linear in the given variables, at most depending on 3 variables. The 20x20 matrix is rather sparse.
What I tried is the following:
In maple, I am defining a differential equation similar to:
(x^2)*diff(y(x), x$2)+x*diff(y(x),x)= a cubic in y(x).
When I try to solve this using dsolve, numeric, I receive some form of memory error, stating that something small*I cannot be stored in datatype = float.
Sorry this isn't too specific - if you need more info or the boundary conditions, or perhaps the error message word-for-word, I'll reply with it when I get to my other laptop.
Thank you very much for your help in advance,