LaTeX forum ⇒ Text FormattingLaTeX representation of hollow "R" symbol for real space?

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clayton
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Joined: Wed May 19, 2010 10:30 pm

LaTeX representation of hollow "R" symbol for real space?

Postby clayton » Wed May 19, 2010 10:33 pm

In LaTeX, how do I represent the hollow "R" symbol that designates the real number space?

Thanks!

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gmedina
Posts: 2313
Joined: Wed Jul 11, 2007 11:45 pm
Location: Colombia

Postby gmedina » Wed May 19, 2010 10:37 pm

Hi,

use \mathbb from amsfonts (loaded by amssymb):

  1. \documentclass{report}
  2. \usepackage{amssymb}
  3.  
  4. \begin{document}
  5.  
  6. $\mathbb{R}$
  7.  
  8. \end{document}
1,1,2,3,5,8,13,21,34,55,89,144,233,...

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clayton
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Postby clayton » Wed May 19, 2010 11:53 pm

Works perfectly! Thanks!

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svend_tveskaeg
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Location: Aarhus, Denmark

Postby svend_tveskaeg » Mon May 24, 2010 6:47 am

Just a note:
One normally represents the sets of natural numbers, integers, rational numbers, real numbers, and complex numbers by bold letters (at least on our math institut). I only use the `hollow' letters when writing on a blackboard.)

For the real numbers that is

  1. \mathbf{R}

instead of

  1. \mathbb{R}
``In the game of chess, you can never let your adversary see your pieces.''
-- Zapp Brannigan, Futurama (season 1, episode 4)

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localghost
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Postby localghost » Mon May 24, 2010 11:47 am

I don't think that your math institute sets the standard [1,2]. Just by the way. The use of blackboard letters for this representation is very common.

[1] Real number - Wikipedia, the free encyclopedia
[2] Reelle tal - Wikipedia, den frie encyklopædi
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