I've been trying to figure out what the correct notation for saying that something can be substituted as something else.
Example: $y=Re*4$ where $Re=\frac{uL}{\nu}$
Is there an appropriate symbol to "where"? Note that "when" and "given" can easily replace "where" in this example.
I did see this question, but most of the answers were tackling how to write the even condition rather than how to relate the two objects together. Also in that example, it's really difficult to tell whether their using the "|" as a "divides by" or a "given" according to Wikipedia's list