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Everything about Collision problem

Theoretical problem

The r-to-1 collision problem is an important theoretical problem in complexity theory, quantum computing, and computational mathematics. The collision problem most often refers to the 2-to-1 version: given even and a function, we are promised that f is either 1-to-1 or 2-to-1. We are only allowed to make queries about the value of for any. The problem then asks how many such queries we need to make to determine with certainty whether f is 1-to-1 or 2-to-1. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Collision problemA 5-minute orientation
  2. Skim a recent paper: Multi-objective optimization for energy-efficient flow shop scheduling problem with blocking and collision-free transportation constraintsInfluential work since 2022
  3. Pick up a classic book: Fragmentation ProcessesThe most-reprinted book on the subject
  4. Read the landmark paper: Triple collision in the collinear three-body problemCited 316 times
  5. Go sideways: BHT algorithmA closely related topic
  6. Go sideways: Simon's problemA closely related topic

📖 Definitions

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🗂️ The subject at a glance

  1. Classical solutions
  2. Quantum solution

🏆 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.

🔗 Related topics