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Everything about Homotopy

Continuous deformation between two continuous functions

In topology, two continuous functions from one topological space to another are called homotopic if one can be "continuously deformed" into the other, such a deformation being called a homotopy between the two functions. A notable use of homotopy is the definition of homotopy groups and cohomotopy groups, important invariants in algebraic topology. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: HomotopyA 5-minute orientation
  2. Skim a recent paper: Natural Convection Non-Newtonian EMHD Dissipative Flow Through a Microchannel Containing a Non-Darcy Porous Medium: Homotopy Perturbation Method StudyInfluential work since 2022
  3. Pick up a classic book: The Mathematical works of J. H. C. WhiteheadThe most-reprinted book on the subject
  4. Read the landmark paper: Homotopy perturbation techniqueCited 2,601 times
  5. Go sideways: Path (topology)A closely related topic
  6. Go sideways: Fundamental groupA closely related topic

📖 Definitions

Noun A continuous deformation of one continuous function or map to another.

Noun The relationship between two continuous functions where homotopy from one to the other is evident.

Noun Ellipsis of homotopy theory (“the systematic study of homotopies and their equivalence classes”).

Noun A theory associating a system of groups with each topological space.

🏆 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