زیرمجموعه
Also known as ⊂, ⊆
150px|thumb|right|class=skin-invert-image|Euler diagram showing A is a [[subset of B (denoted A \subseteq B) and, conversely, B is a superset of A (denoted B \supseteq A)]]
AI overview
A subset is a collection of items where every item in it also belongs to a larger collection. Understanding subsets matters because it's a fundamental way to organize and compare groups of things, showing how smaller collections fit inside bigger ones.
AI-generated from the Wikipedia summary — may contain errors.