Overview
Sets can contain the same element only once. This means . A bag (or multiset) can include a single element multiple times.
Bibliography
- “Multiset,” in Wikipedia, April 4, 2024, https://en.wikipedia.org/w/index.php?title=Multiset&oldid=1217165725.
- Oscar Levin, Discrete Mathematics: An Open Introduction, 3rd ed., n.d., https://discrete.openmathbooks.org/pdfs/dmoi3-tablet.pdf.