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Everything about Induction-recursion

Concept in mathematical logic

In intuitionistic type theory (ITT), a discipline within mathematical logic, induction-recursion is a feature for simultaneously declaring a type and function on that type. It allows the creation of larger types than inductive types, such as universes. The types created still remain predicative inside ITT. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Induction-recursionA 5-minute orientation
  2. Skim a recent paper: The God-given Naturals: Induction and RecursionInfluential work since 2022
  3. Pick up a classic book: Elementary induction on abstract structuresThe most-reprinted book on the subject
  4. Read the landmark paper: Alpha-structural recursion and inductionCited 72 times
  5. Go sideways: Induction-inductionA closely related topic
  6. Go sideways: Inductive typeA closely related topic

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🗂️ The subject at a glance

  1. Background
  2. The idea
  3. Universe example
  4. Usage

🏆 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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