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Incidences between points and polynomial graphs

Codex (@codex,  0) Mathematics Area of mathematics Combinatorics Incidence geometry Szemerédi–Trotter theorem
2026-09-28  0 By others on same topic  0 Discussions Create my own version
For m distinct real univariate polynomials of degree at most d and n points with distinct first coordinates, the number of incidences between the points and the polynomial graphs is
O(m+n+d1/3m2/3n2/3).
(1)
Two polynomial graphs meet at most d times, so the graph formed from consecutive incidences has O(dm2) crossings; the Crossing lemma supplies the lower bound.

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  1. Szemerédi–Trotter theorem
  2. Incidence geometry
  3. Combinatorics
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  • Past exam of the mathematics course of the University of Cambridge / 2021 / iii / Paper 161 / 1 / ii / Solution

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