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Everything about Functional square root

Function that, applied twice, gives another function

In mathematics, a functional square root (sometimes called a half iterate) is a square root of a function with respect to the operation of function composition. In other words, a functional square root of a function g is a function f satisfying f(f(x)) = g(x) for all x. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Functional square rootA 5-minute orientation
  2. Skim a recent paper: The dynamics of a delayed predator-prey model with square root functional response and stage structureInfluential work since 2022
  3. Pick up a classic book: Algebra 2The most-reprinted book on the subject
  4. Read the landmark paper: Predator–prey dynamics with square root functional responsesCited 216 times
  5. Go sideways: Iterated functionA closely related topic
  6. Go sideways: Schröder's equationA closely related topic

📖 Definitions

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🗂️ The subject at a glance

  1. Notation
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🏆 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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