Combinatorics and graph theory 3

Lecture: Monday 10:40 in S11. Tutorials (Dinis Vitorino): Tuesday 10:40 in S7.

Conditions to pass the tutorials: Getting sufficiently many points for active participation; for more details, contact Dinis Vitorino who leads the tutorials.

Plan of lectures
  • 5.10. [ZD]: Graph classes closed under subgraphs/minors/...: Lecture notes: Introduction and Section 1, excluding the parts on treedepth.
  • 12.10. [ZD]: Minor-closed classes, Hadwiger's conjecture, average degrees: Lecture notes: Everything except for section 4.
  • 19.10. [ZD]: Topological minors, Hajós' conjecture, linkedness: Lecture notes: Sections 2 and 3; Lemma 2 from these notes.
  • 26.10. [ZD]: Tree decompositions and treewidth, brambles. Definition and Corollary 9 (with slightly different proof) from these lecture notes, section 1 from these. See these notes for the results on brambles, till the end of Section 1.
  • 2.11. [ZD]: Grid minors, ladder lemma, Courcelle's theorem. Lecture notes, section 2, and these notes, section 1.
  • 9.11. [??]: List coloring and polynomial method: Lecture notes, only the part on Alon-Tarsi method.
  • 16.11. [??]: VC-dimension (definition, examples, statement of Theorem 3, application to approximation algoritms from the lecture notes).
  • 23.11. [??]: Spanning trees (everything from the lecture notes).
  • 30.11. [RŠ]: Epsilon-regular pairs and the formulation of the Regularity Lemma. Lecture notes.
  • 7.12. [RŠ]: Applications of the Regularity Lemma. Lecture notes.
  • 14.12. [RŠ]: Arithmetic Ramsey theory. Section 1 from the lecture notes.
  • 4.1. [RŠ]: Proof of Regularity lemma. Lecture notes.
Obsah přednášek a poznámky
  1. Epsilon-regulární páry
  2. Regularity lemma a jeho aplikace
  3. Další aplikace a důkaz Regularity lemmatu
  4. Hypergrafové removal lemma a aritmetická Ramseyovská teorie.
  5. Minory a stupně.
  6. Linkovanost a topologické minory.
  7. Erdős-Hajnalova hypotéza. Kografy.
  8. Stromové rozklady, chordální grafy, stromová šířka, Erdős-Pósova věta.
  9. Algoritmické aspekty stromové šířky.
  10. Kostry v grafech, English version.
  11. Polynomiální metoda, Nullstellensatz (plus úvod do seznamové barevnosti), English version.
  12. VC-dimenze, English version.
Další zdroje

Domácí úkoly (rok 2016):

Domácí úkoly (rok 2015):

Anglické verze poznámek (rok 2014):