## 13 Badges

13 years, 185 days

## more info needed...

check your initial conditions. Hard to tell what is wrong without seeing the model, why not load it up?

## @Volker Lehner  Agreed. Do you hav...

Agreed. Do you have experience with other programs where you would say that Units are implemented as they should?

needs attachment

## why use Maple...

it takes longer to type the formula into Maple than doing this by hand. Simplify the square bracket.

## @taro  sometimes it is easier just...

sometimes it is easier just to manually rewrite your expression the way you want to have it.

## Modelica Fluid Pipe...

sorry, I don't know. Have you tried the Library search? https://impact.github.io/#/

## New website...

I'm not an expert for this topic, but there is a new community forum driven by Maplesoft, which is dedicated to Maple TA and the new learning plattform Möbius. You should try it out and ask your question there: https://mapletacommunity.com

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## old Maple 18...

You probably cannot do much, the bug does not appear in the current release Maple 2016

dgl:=26*(diff(y(x), x\$4))-50*(diff(y(x),x\$2))-2*y(x) = 0;dsolve(dgl);odetest(%,dgl);

0

## @Vliegkikker  solve does not conta...

solve does not contain eq Md, but Mb which is commented out.

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## @Mariusz Iwaniuk  great, Maple roc...

great, Maple rocks with Mathematica as engine :o)

## Maple Player?...

.

Maybe this is a misunderstanding and they downloaded the free but limited Maple Player from the Maplesoft website?

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## kernelopts...

Additionally, to avoid the float evaluation of Pi (if wanted):

restart;
kernelopts(floatPi = false);
W := t*(62.8+0.0945*d/t)/(Pi*d);
eval(W,t = d*TD):expand(%);

## @Pascal4QM  strange, this does not ...

strange, this does not seem to work as equality:

`%=`(`%-`(2*x-5, 2), 3*x-6);

value(%);

the constants are not simplified completely

## @Pascal4QM  not bad. One can even n...

not bad. One can even nest operator form to prevent simplification on one side of the unequality, i.e.

`%>`(`%-`(2*x-5, 2), 3*x-6)

Not sure how to evaluate it back to simplified form, though.

## why time based?...

@rlopez

I'm wondering why there is a reference to a physics property in that help page. How is the time variable different from any other  independent variable?

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