Does anyone know a good resource (preferably pictures) that illustrates a conventional way to write the special sets symbols, i.e. $\mathbb{N,Z,Q,R,C}$ etc., by hand?
How to write special set notation by hand?
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$\begingroup$
notation
online-resources
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0@Martin : I write them exactly the same! Except that you sketched the $\mathbb C$ very bad. But I use the same technique :P – 2012-05-31
2 Answers
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I don't think anybody duplicates mathblackboard very exactly. I'll describe what I do.
For $\mathbb{N}$, I draw the left vertical and a diagonal as normal, then I start over drawing another diagonal parallel to the first, then finish the right vertical. I do something similar for $\mathbb{Z}$.
For $\mathbb{R}$ and $\mathbb{H}$ I write an $R$ or $H$ as normal and then just double the left vertical. For $\mathbb{Q}$ and $\mathbb{C}$ I write a $Q$ or $C$ as normal, then add a vertical secant line close to the left side.
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0@WillieWong I know I used to do that! I didn't realize I stopped. I think my method for doing $\mathbb{Z}$ probably became contagious and changed my $\mathbb{N}$. Anyway, I would like to endorse that as a completely standard thing, too. – 2012-05-31
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Well this is the way I draw them anyway :)
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1@Lubin: it's $a$ m$a$tter of person$a$l choice. The Lati$n$ rule is interesting though, never heard of that. – 2012-05-31