sets
comm: working with sets and multisets at the command line

The comm utility lets you find which lines are unique to one file or another, and which lines are common to both.
How to Find Frequent Itemsets with the Apriori Algorithm in Python

Learn how to use Python's Apriori algorithm to find frequent itemsets in transaction data automatically.
Apriori uses a simple strategy: if a set of items appears rarely, any larger set containing those items will be even rarer. This allows the algorithm to skip large portions of the search space.
An Introduction to Multisets

Multisets are sets that allow repetition of elements. As such, multisets pave the way to a number of interesting possibilities of theoretical and applied nature. In the present work, after revising the main aspects of traditional sets, we introduce some of the main concepts and…
Multisets are sets that allow repetition of elements.
generalization to take into account vectors and matrices
Learn Python: Sets

Introduction to sets in Python
10 things you should know about Sets in Python

Guidelines to use sets in Python
Set Theory Ordered Pairs and Cartesian Product with R
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