## 698 Reputation

15 years, 96 days

## The third graph was plotted...

The third graph was plotted with default plotpoints,that astonished me

z := x + I*y

ParametricPlot[Through[{Re, Im}[1/z]], {x, 1/4, 1/2}, {y, -2, 2}]

Yesterday I think it should be easier

## Sorry for that,sometimes I'd...

Sorry for that,sometimes I'd like to know how to do that also in mathematica,and I copy the expressions from it.

And Mathematica can be more quickly lauched,it's memory management is better.

question1 maybe a error in my reference book,and I made the 1 to 1-I,that's my wrong.

Pi - ArcTan[Cot[Abs[Tanh[1]]]],but I calculate this seems 2.33239

I'd wanna make the argument in more flexible expression with trig manipulation.

question 3':Plot this:abs(z-2)<2,1<abs(z-1)  ,

## Sorry for that,sometimes I'd...

Sorry for that,sometimes I'd like to know how to do that also in mathematica,and I copy the expressions from it.

And Mathematica can be more quickly lauched,it's memory management is better.

question1 maybe a error in my reference book,and I made the 1 to 1-I,that's my wrong.

Pi - ArcTan[Cot[Abs[Tanh[1]]]],but I calculate this seems 2.33239

I'd wanna make the argument in more flexible expression with trig manipulation.

question 3':Plot this:abs(z-2)<2,1<abs(z-1)  ,

## happy to know that,now I can...

happy to know that,now I can solve the problem entirely.

a little disappointed was that the use of (FileTools[Text])[ReadLine] is limited,

Can I redefine the name of these long function?

f("word.txt")=(module() export Text,Binary,AtEndOfFile,Copy,Exists,Position,Size,Status,Flush,IsDirectory,IsExecutable,IsLockable,IsOpen,IsReadable,IsWritable,Lock,ListDirectory,ModificationTime,Remove,Rename,TemporaryFilename,Unlock,MakeDirectory,AbsolutePath,Filename,ParentDirectory; description "library of file operations"; ... end module)("word.txt") [Text][ReadLine]("word.txt")

## happy to know that,now I can...

happy to know that,now I can solve the problem entirely.

a little disappointed was that the use of (FileTools[Text])[ReadLine] is limited,

Can I redefine the name of these long function?

f("word.txt")=(module() export Text,Binary,AtEndOfFile,Copy,Exists,Position,Size,Status,Flush,IsDirectory,IsExecutable,IsLockable,IsOpen,IsReadable,IsWritable,Lock,ListDirectory,ModificationTime,Remove,Rename,TemporaryFilename,Unlock,MakeDirectory,AbsolutePath,Filename,ParentDirectory; description "library of file operations"; ... end module)("word.txt") [Text][ReadLine]("word.txt")

## a := [1, 2] b := [2, 3] then...

a := [1, 2]

b := [2, 3]

then a*b=[1,2][2,3] (this can be copied to my process)

but if I define a matrix

a := Matrix([[1, 2, 3], [2, 1, 3]])

b := Matrix([[1, 2, 3], [1, 3, 2]])

of course I can't a*b

for multiplication of matrix has been pre-defined.

if a*b=Matrix([[1, 2, 3], [3, 1, 2]]) (this also can be copied to my area writing process)

## a := [1, 2] b := [2, 3] then...

a := [1, 2]

b := [2, 3]

then a*b=[1,2][2,3] (this can be copied to my process)

but if I define a matrix

a := Matrix([[1, 2, 3], [2, 1, 3]])

b := Matrix([[1, 2, 3], [1, 3, 2]])

of course I can't a*b

for multiplication of matrix has been pre-defined.

if a*b=Matrix([[1, 2, 3], [3, 1, 2]]) (this also can be copied to my area writing process)

## en, Do you think it'll be...

en,

Do you think it'll be more and more easier

to use computer(such as maple) do math problems\exercises?

there will be some breakthrough in AI,algebraic system, in  the following 20 years? 30 years?50 years?

I remmeber a sentence:Only you learn math well,then you can use maple well.

## en, Do you think it'll be...

en,

Do you think it'll be more and more easier

to use computer(such as maple) do math problems\exercises?

there will be some breakthrough in AI,algebraic system, in  the following 20 years? 30 years?50 years?

I remmeber a sentence:Only you learn math well,then you can use maple well.

## It works,yesterday I've...

It works,

yesterday I've asked another question,but was deleted,

for i from 1 by 1 to 11 do FileTools[Text][ReadLine]("word.txt") end do

when I use this to inport the name's words,they are vertically placed,every word is in a line.

how to make it horizontal,like a array,sequence, this form

["alpha", "beta", "gamma"], or [alpha,beta,gamma]

or other function,methods to import the names.

## It works,yesterday I've...

It works,

yesterday I've asked another question,but was deleted,

for i from 1 by 1 to 11 do FileTools[Text][ReadLine]("word.txt") end do

when I use this to inport the name's words,they are vertically placed,every word is in a line.

how to make it horizontal,like a array,sequence, this form

["alpha", "beta", "gamma"], or [alpha,beta,gamma]

or other function,methods to import the names.

## in 2D math mode "aaa.jpg"...

in 2D math mode "aaa.jpg" will be recognized as "aaa"."jpg"

how to convert

alpha

beta

gamma

to["alpha.jpg", "beta.jpg", "gamma.jpg"];

If there exsit the file's original name is kkk,then rename kkk to kkk.jpg will not right,will comes out a kkk.jpg file which is not a picture,and the original file kkk will not be modified.

There are so many mode ,format,in Mma and Maple...really bothersome...

## in 2D math mode "aaa.jpg"...

in 2D math mode "aaa.jpg" will be recognized as "aaa"."jpg"

how to convert

alpha

beta

gamma

to["alpha.jpg", "beta.jpg", "gamma.jpg"];

If there exsit the file's original name is kkk,then rename kkk to kkk.jpg will not right,will comes out a kkk.jpg file which is not a picture,and the original file kkk will not be modified.

There are so many mode ,format,in Mma and Maple...really bothersome...

## but my own post,I cann't...

but my own post,I cann't edit,someone told me that there is a edit button under the topic,today is the first time i see it,

I mean I can't edit my own post,but I can edit my comments.

sometimes I'll make errors in my post,maybe they need to be modified and updated,such as some posts wihout replies,

http://www.mapleprimes.com/forum/suspensionpointsandmatrixordeterminant

here I've asked that:I cann't edit my first comment and post,there is a printscreen.

and some one answered,but I can't find it,maybe the websites can combine one's all posts in one page,then we can search what we forgotten in which post.

## but my own post,I cann't...

but my own post,I cann't edit,someone told me that there is a edit button under the topic,today is the first time i see it,

I mean I can't edit my own post,but I can edit my comments.

sometimes I'll make errors in my post,maybe they need to be modified and updated,such as some posts wihout replies,

http://www.mapleprimes.com/forum/suspensionpointsandmatrixordeterminant

here I've asked that:I cann't edit my first comment and post,there is a printscreen.

and some one answered,but I can't find it,maybe the websites can combine one's all posts in one page,then we can search what we forgotten in which post.

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