# Greek symbol for bit?

Symbols / greek letters are used in mathematical notation for variables, functions etc. and commonly informs the reader that it is definied within a conventional accepted range. What is the most common symbol for a bit / two-state integer?

I found maybe the $$\xi$$ symbol can be used? or maybe something else is used.

For example $$\xi\in\mathbb{Z^+}$$ where $$\xi$$ can either be $$0$$ or $$1$$. $$\xi \equiv 0 |1\pmod 2$$

Question is; which symbol is commonly used for a two state variable?

• So long as you define it, it doesn't really matter what symbol you use. That being said, $\chi$ appears in several contexts as indicator variables / indicator functions / random variables such as here and would have been my first choice outside of using $a,\alpha,x$. – JMoravitz Nov 14 '18 at 23:16
• @JMoravitz Ok. I like $\alpha$. I might just use that. And yeah, I could have added that the variable I need a greek letter for acts like a flag (on or off) etc. – Natural Number Guy Nov 14 '18 at 23:23