complex conjugate of a variable

asked 2012-04-15 12:00:58 +0200

d3banjan
73 ●5 ●6 ●14

updated 2012-04-15 14:50:40 +0200

I attempted to construct the complex conjugate of a variable thus -

x = var('x')
f = x*conjugate(x)
f({x:2+2i})

this throws a SyntaxError, although the f({x:2}) case works perfectly.

edit retag flag offensive close merge delete

Comments

why isn't the markdown for code working?

d3banjan ( 2012-04-15 12:01:40 +0200 )edit

Missing linebreak. There seemed to be HTML tags interspersed in your post for some reason. Incidentally, you can click on the "010101" button to select and format code instead of doing a manual indent.

DSM ( 2012-04-15 13:11:57 +0200 )edit

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2012-04-15 13:14:54 +0200

DSM

5242 ●21 ●68 ●112

f({x:2+2i}) can never have worked: 2i isn't valid Sage. Either use *I or j, depending on where you want the result to live:

sage: 2+2i   
------------------------------------------------------------
   File "<ipython console>", line 1
     Integer(2)+2i
                 ^
SyntaxError: invalid syntax

sage: 2+2j
2.00000000000000 + 2.00000000000000*I
sage: parent(_)
Complex Field with 53 bits of precision
sage: 2+2*I    
2*I + 2
sage: parent(_)
Symbolic Ring

edit flag offensive delete link

add a comment

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools

1 follower

Stats

Asked: 2012-04-15 12:00:58 +0200

Seen: 3,549 times

Last updated: Apr 15 '12

complex conjugate of a variable edit