## From Mathematica to Maple...

Dears,

I have seen a Mathematica code which I would like to have it in Maple, since I do not know that program. Let f(z) an analytic function, say f(z):=1+2^{z+1}+3^{z}. To find the roots of f(z) in a regingion, we can use in Maple the command "Analytic" (of the package "RootFinding"). However, in Mathematica is used the following:

L = 20; Monitor[zeros = Flatten@Table[N[z /. Solve[f[z] ⩵ 0 && k L ≤ Re[z] ≤ k L + L && -10 < Im[z] < 10, z], 25],{k, 300}],k];

What means the "N[z/. Solve..." instruction? Also, the following command:

SortBy[zeros, Re];

Can be "translated" to Maple?

With Regards,

G.

## How to refine the piecewise output of dsolve[numer...

Hi there,

The command

dsolve(MyOde, numeric, range=MyRange, method=rosenbrock, output=piecewise)

returns a list of solution pieces which is not sufficiently dense according to how I intend to use it.

Is there a possibility to impose the "number of pieces" or the positions of the "breaks" in this command ?

Thanks in advance for any suggestion.

## how to input third order IVP in maple ...

my problem is how to put the third order IVP in derivate code for solving third order problems

the problem is y'''+2y"-9y'-18y=18x^2-18x+22

Digits := 18;
with(LinearAlgebra);
f := proc (n) -----;

derivative

g := proc (n)----- ;

please i need to know to to reresent it in the f := proc (n) and g := proc (n) where g := proc (n) is the derivative of f(x).

## How to print units in a table-structured plot ?...

Hi everybody,

I want to plot many curves in the form of a table.

For instance, let    p := plot(x, x=0..1, labels=[x*Unit('m'), y*Unit('m')]):

The command   plots:-display(p)  returns a plot  with labels x [[m]] and y [[m]], just as expected.

But the commands (remember I have several plots)
plots:-display(<p>);                              # and the generalization plots:-display(<p | p>)
DocumentTools:-Tabulate([p]);           # and the generalizationDocumentTools:-Tabulate([p,p])
both provide labels  x Units:-Unit('m') and  y Units:-Unit('m')

Is there a way to fix this and obtain plots withe the expected labels ?

Thank to all of you for yout help

## how to find the truncation error of third order IV...

i need a help on how to find the local truncation error of a hybird block method of three order IVP. here is the one of the discrete methods i need to find the local truncation error. please any solution should put here thanks

## Problem with Maple 2015.0 build 1022128 on 2-monit...

The following image shows a .mw file on two monitors (1 = right side) (2 = left side).

Distortion occurs when I try to drag-and-drop an open file from monitor 1 to monitor 2.  Transfer from one monitor to another works fine on all other applications (.pdf, .docx, web stuff, graphic files like .png, and .xlsx.  Only .mw files distort when I try to open them or move them to monitor 2.  I was able to move, open, etc. any .mw file for over a year, then a couple of days ago the files started to distort.  I had a 32-bit version of Maple (Maple 2015.2 build ID 1097895—deleted it.  Also deleted and reinstalled Maple 2015.0, build 1022128.  I checked and updated my video card, updated the 2-monitor settings on Windows 7.  All this to no avail, the Maple 2015.0 program works on monitor 1, but it can not be opened or dragged-and-dropped to monitor 2.

Help, advice, suggestions welcomed—many thanks in advance.

Les

## Exponential Fit Problem...

See WA30 attached.  Why the error?  The variable that represents the vector is in vector form.  If I need to change this to THAXexa := ([1988.0, 1989.0, 1990.0 , ... etc], datatype=float, is there an easy way to convert the THAXexa matrix?

Thanks, Les  WA30.mw

## Exponential models?...

In Maple 2015 is there a way to fit data to an exponential model and determine the goodness of fit?

Les

## Using wsolve and package charsests for proving geo...

I would like to use method wsolve for solving polynomial equations. The method has been implemented by Wang: https://link.springer.com/chapter/10.1007/978-3-7091-6604-8_9

As it is written in the text the metod is part of charsets package. But I can seem to find it and active it. I can find package online (http://wang.cc4cm.org/charsets.html), but I don't know how to add it to Maple.

I need to use this method in order to prove geometry theorems (and not any other method will do) and compare my results with results of other researchers.

## how can found points on boundary line of surface...

dear all,

I have a problem when I try to find points on boundary of the surface.

the surface ploted from a matrix as follow:

please help me to generate a bondary curve of this surface.

Thanks

## How can plot3d a sub-surface from surface ?...

Hi, everybody.

I have a problem when I try to plot3d a sub-surface from a surface as follows:

 >
 (1)
 >
 (2)
 >
 > p:= proc(u,v) if u
 > h:= proc(u) 2*u  end proc:
 >
 >

sub-surface.mw

Thanks and have a nice day.

## Weibull Distribution Formula...

What is the Maple Formula for the Excel function: =WEIBULL.DIST(A1,2,6.2,FALSE)

where A1..A26 is 0..26  ?  How do I plot it?

Thank you, Les

## Vectors.Aproximate constants a,b,c....

So, i have 3 vectors:

A=2i-3j+ak

B=bi+j-4k

C=3i+cj+2k

where a,b,c are constants.

such that A is perpedicular on B and C, and the scalar product B*C=2.I have to estimate this constants using an iterative algorithm on Maple and then solve the problem using predefined function from Maple and compare the results.If you have an idea pls let me know.Thank you.Sry if I wasn't clear.

## I really need your help, please....

Ok, so i have this functions

where f(x) represent urban population and g(x) represent the rural population.

And i have to implement an algortihm in Maple to find out after what period of time x the rural population will be with 20% bigger than urban population.

I'm new in Maple and is a little bit hard for me to implement algorithms in this program.If you can help me with any idea, i will really apreciate.Thank you :).