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Everything about Binary relation

Relationship between elements of two sets

In mathematics, a binary relation associates some elements of one set called the domain with some elements of another set called the codomain. Precisely, a binary relation over sets X and Y is a set of ordered pairs (x,y), where x is an element of X and y is an element of Y. It encodes the common concept of relation: an element is related to an element if and only if the pair belongs to the set of ordered pairs that defines the binary relation. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Binary relationA 5-minute orientation
  2. Skim a recent paper: The Matthews correlation coefficient (MCC) should replace the ROC AUC as the standard metric for assessing binary classificationInfluential work since 2022
  3. Pick up a classic book: Zero is not the only storyThe most-reprinted book on the subject
  4. Read the landmark paper: The advantages of the Matthews correlation coefficient (MCC) over F1 score and accuracy in binary classification evaluationCited 5,773 times
  5. Go sideways: Homogeneous relationA closely related topic
  6. Go sideways: Relation (mathematics)A closely related topic

📖 Definitions

Noun A subset of the Cartesian product A×A (the set of ordered pairs (a, b) of elements of A, alternatively written as A2).

Noun A subset of the Cartesian product A×B.

🏆 Landmark papers (most cited)

🆕 Influential since 2022

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

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