Hello everybody, My name is Daniel. I have a simple question. I'm just doing some research for my thoery and I found myself just in the topic of stirling's formula. It is denoted with an equals sign that is bent in like the top bar of the equals sign in bent down, and the bottom bar of the equals sign is bent up. What is this symbol? (like it looks like = but, is modified). I apologize if this is a simple answer just my book doesn't give the written definition of the formula. Thank you for your time :).