I have an expression that contains arbitrary complex parameters $\mu_1$ and $\mu_2$. Additionally this expression contains a parameter $\sigma$ that is boolean like (takes values 1 or 0). The expression is:
$$v=\sigma v_1+\mu_1 v_2+\mu_2 v_3$$
Is there some mathematical convention how to treat boolean variables? Is there a special term for them (like binary/boolean variable)? And are there any preferred symbols that are used for such variables?
Thank you alot for reading my question.