thanks a lot@Kitonum 

@Kitonum 

Binary(4);

convert(4, base, 2);#Check

                           [1, 0, 0]
                           [0, 0, 1] ?
 

Maybe this help you:https://www.mapleprimes.com/questions/203465-How-Do-I-WRITE-not-convert-To-A

 Maple does not give any solution because No solution exist in yours case.

Mathematica 11.3 can't compute limit (2) too.

@acer 

Thanks. Exactly that's what I needed.

@vv 

Thank you very much. :)

@vv 

Thanks,but:

plot([f, 'fdiff(f(t), t = x)'], x = 0 .. 10);# Not working ?

plot([f, 'fdiff(f(t), t = x)'], 0 .. 10);# Not working ?

How to do it on  the one plot  not using a display command.? 

@Kitonum 

Thanks ,but i need  solution of my problem with new Interpolation[Interpolate] packges.

Probably exact solution no exist. With Maple 2018 and updated version Physics package version 39 ,Maple return NULL.

Mathematica 11.3 also does not know the answer.

No-PDE_exact.mw

PDE Mathematica.pdf

@ecterrab 

Ok thank for the explanation.

@ecterrab 

In Maple Help:

?DifferentialThomas;

Overview of the DifferentialThomas Package.

When I click on the blue underlined subtitles such as:

ComplementOfDecomposition
Equations
Inequations
IntersectDecompositions
LinearCombination
NormalForm
PowerSeriesSolution
Ranking.
ReducedForm
ThomasDecomposition
Tools

CheckResults
Differentiate
Display
FromJet
Initial
Leader
Reset
RunEncapsulated
Separant
ThomasOptions
ToJet

and more, nothing happens ?

There are no descriptions of these functions ?

@Rouben Rostamian  

Thank you for the good explanation of the matter.

@Adam Ledger 

I post this bug to SCR and send me back they said:  its not a bug it's a design.

@tomleslie 

Thanks for the clarification.
I understand what and how.