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?
It is very common to use the letter y for binary variables. y1, y2, y3 etc.
I don't think there is any Greek letter particularly used for this.