1. Lasaro

In the last line, where “\leq0″ should be replaced by “\geq 0″

2. Cesar

Thanks guy! That’s really help

3. Yep, this helped me ! Thanks!

4. mathguy

Shouldn’t the integers be Z not I?

• You were right, thanks for the comment. I changed it.

Cheers,
Tom

5. Sean

Wow, awesome! Exactly what I needed: thanks!

6. This will really be helpful in writing my algebra and geometry blog, thanks.

Regards,

Mr. Pi

7. Enrique Argones Rúa

Why don’t you choose the more traditional notation \mathds{R}, \mathds{N}, etc.?

For using this you would have to include the package dsfont.

Cheers,

Enrique

8. Joe

THANK YOU! I’ve been digging around for an hour now looking for that. I can be picky about my fonts.

9. Joe

..I should have been more specific: thanks Enrique! The mathbb font is pretty well known, but the font for the more traditional number systems is hard to find.

• Hi,

Not sure if a number set symbol is commonly used for binary numbers. But try the following with any letter:

\usepackage{amssymb}
...
$\mathbb{B}$

Best, Tom.

11. one

Nice, thank you

12. Chewett

Thanks, very useful

13. Senthil

Thanks. Really its help to me.

14. Heni

Hi,how R^n write in Latex? THANK YOU ^^

• Hey Heni,

Thanks for your question. Is this what you were looking for?

\documentclass[11pt]{article}
\usepackage{amssymb}
\begin{document}
$\mathbb{R}^n$
\end{document}
• Joan

Though a minor difference, $\mathbb{R}^n$ produces a BOLD n as the dimension of R. Is there any way to make this n slimmer?

Thanks a lot.

• tom

Hi Joan,

How you perceive it might depend on the font used. In Computer Modern, the n doesn’t look bold in my opinion. Here’s what a bold n would look like, as compared to the normal font style in math mode:

\documentclass[11pt]{article}
\usepackage{amsfonts, amsmath, graphicx}
\begin{document}
$\mathbb{R}^{\boldsymbol n} \text{ vs. } \mathbb{R}^{n}$
\end{document}

Maybe you want to change the font size to make the letter n slimmer, and smaller obviously?

Also, I’d be curious to learn what configuration you used that made the letter thicker than what you would expect.

Cheers, Tom

15. Courtney

Hi! In the last line, the set of positive reals should be strictly R_>0, not R_≥0, which represents the nonnegative reals. The difference is subtle, but important

• Fixed! Thanks very much Courtney! Best, Tom.

16. m

Thanks! I found this very useful

• tom