Dmitry Lyakhov

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10 years, 269 days

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These are questions asked by Dmitry Lyakhov

Hallo. I'm solving a initial value problem for system of 7 ODE:

dsn := dsolve({expand(maineq[1, 1]), expand(maineq[1, 2]), expand(maineq[1, 3]), expand(maineq[1, 4]), expand(maineq[1, 5]), expand(maineq[1, 6]), expand(maineq[1, 7]), T(0) = .5, u(0) = u0, Y[1](0) = .8, Y[2](0) = .2, Y[3](0) = 0, Y[4](0) = 0, Y[5](0) = 0}, numeric, method = lsode[backfull])

 

Is there easy way how to plot result?

 

 

 

I'm using MAPLE files, and a little to bored to run all commands in it.

Instead of it would be a bit easier to make a package.

Is there any post here how can I do it?

Hallo, I have a list with derrivatives. I'd like to choose elements with highest derrivative.

Is there any procedure in Maple to determine order of derrivative?

Hallo. I'd like to use two commands in loop like:

for i from 1 by 1 to k  do r:=Search(polyQ[i],[Q]) and T[r]:=T[r]-polyeq[i] end do

But Maple: "Error, unterminated loop". Hmm...

I have two lists with differential monomials, like this: [y'y'', y''', (y'')^2].

List is rather big, i want to check if one such a list contains in other.

Seems to be that there is some internal procedure for this operation.

But I don't know what it is...

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