## 490 Reputation

8 years, 188 days
Maple is to me difficult. The first version I bought was Maple9, and it was more than 15 years ago. But, I couldn't use it, feeling it too difficult. But, three years ago, I thought Maple might be helpful to my study, and since then, I have continued to learn Maple. As I got able to read the Maple help, I think that I could get to use maple better now than before. But, I feel that I am a beginner yet.

## MaplePrimes Activity

### These are replies submitted by taro

Would you please tell me why "," that is comma, at the last of "evalindets(Expr, 'function', t->op(0, t)), " in yor code,
cannot be replaced with ";" that is semicolon?

## difference between extreme points and cr...

Sorry. As the description of two commands are the same other than the outcome of
examples there, I thought they were the same. But, they are different.
See below.

plot(-(x+2)*(x+1)*(x-1),x=-2.1..2.1);
evalf(ExtremePoints(-(x+2)*(x+1)*(x-1),x=-3..3));
evalf(CriticalPoints(-(x+2)*(x+1)*(x-1),x=-3..3));


The output of ExtremePoints contains the end points x=-3..3, and
that of CriticalPoints does not.
So, in the case of the original question, CriticalPoints, which is Markiyan's answer, is more appropriate.

## To Scot...

I think that I wrote the above anwer after reading mskalsi's question of
"I am interested in derivative. In fact my aim is to extract Maxima and Minima from plot."

As for the extreme points, the following which is  almost the same
as that of Markiyan Hirnyk, just different in the name, is my answer.

f:=0.012981+0.080285*cos(0.9519256799*x)+0.041370*cos(1.903851360*x)+
0.035690*cos(2.855777040*x)+0.000147*cos(3.807702720*x):

Student[Calculus1]:-ExtremePoints(f,x);
I don't know why two commands with the same function exist.
And, as for maximum of f,

Optimization[Maximize](f, x = -6 .. 6);
works.

## I think more details are necessary...

Can you explain the meaning of your A_i B_{i j} = \sum_{i=1}^3 A_i B_{i j} in more detail with some conclete example?
And, please explain the meaning of your second expression of A_{i j} B_{m j} C_{i m} V_k.
From where did ,for example, the expression A_{i j} come from?

a:=-0.2126639710e-354*(-29.5456666e356*exp(-4.150297840*y)*cos(3.641492391*y));
628.3298785 exp(-4.150297840 y) cos(3.641492391 y)
evalf(Int(a,y=-b..b));
/b
|
|     628.3298785 exp(-4.150297840 y) cos(3.641492391 y) dy
|
/-1. b



The output of evalf(Int(a,y=-b..b)) cannot be evaluated to be numeric, because b is just a variable.

## I think that even maple 2016 does not su...

Maple 2016 is not assumed to work on Sierra.

http://www.maplesoft.com/products/system_requirements.aspx#maple

You have to wait for the next version of maple for its using in the Sierra.

Though this is not an answer to your question, I changed my setting of maple 2016 and mac osx 10.11.6
to Spanish setting, then I did what you did to get that eps.
As I cannot append the file with the extention eps to this site, I changed that extention to txt.
Can you open that file with double clicking after changing that extention of txt to eps?

By the way, I could open that file with my environment.

prueba.txt

## How any software can solve the expressio...

@Rouben Rostamian
Please write more explicitly for the function g.

Doesn't you file have the name containing " i ", but the dot of i is not dot but comma?
And, does the same error occur even if you change that i specific to Spanish to the usual i in English?
Containing such as umlaut seems to induce some errors, which has  been reported in Mapleprimes.

## What is that Prefix command?...

Is there that Prefix command anywhere in Maple?

## Thank you for telling me a nice tips...

Thank you for telling me convert command. It can change eps to pdf as well as png, very convenient.

## I could open eps with Skim, and Preview ...

I don't have any illustrator or such sort, so I used Preview of Apple, and Skim, which is like acrobat reader,
And, though Preview converts eps file to pdf, it can open that pdf, and for Skim, it can open eps itself.

## undo...

Edit of menubar-> undo brings you to before you delete something.

Or, you can execute the original command again and get the original answer.