This page describes the notation used in problems/solutions from the book "250 Problems in Elementary Number Theory"
|Symbol/Abbreviation||Word form||Example usage||Meaning|
||||"divides"||a | b||Integer divisibility. a divides b means b is divisible by a|
|¬|||"does not divide"||a ¬| b||Integer indivisibility. a ¬| b means b is not divisible by a|
|≤||"less than or equal to"||a ≤ b||Integer comparison. a ≤ b means b is less than or equal to b|