The formal definition is a fairly gentle introduction to logical math. Here is a decent enough write-up: https://justin.abrah.ms/computer-science/understanding-

The formal definition is a fairly gentle introduction to logical math. Here is a decent enough write-up: https://justin.abrah.ms/computer-science/understanding-big-o-formal-definition.html https://justin.abrah.ms/computer-science/understanding-big-o...