Learn · NPTEL

Course11110615558 lectures

Combinatorics

Prof. Narayanan N · IIT Madras

Start with lecture 1 At NPTEL

About

We start with the finite and infinite avatars of the Pigeonhole Principle, Basic counting tools and the twelvefold way followed by compositions and partitions of integers and Stirling numbers. We then look at Inclusion exclusion and Mobius inversion followed by generating functions. We then look at Polya's theorem, graphs and conclude with a short introduction to species of structures.

Intended audience: UG students

Prerequisites: Basic Mathematical Maturity expected from a Mathematics student at the level of 10+2. Familiarity with group theory will be addedadvantage (not necessary).

Lectures

Week 1

  1. Pigeonhole Principle YouTube
  2. Dirichlet theorem and Erdos-Szekeres Theorem YouTube
  3. Ramey theorem as generalisation of PHP YouTube
  4. An infinite flock of Pigeons YouTube

Week 2

  1. Basic Counting - the sum and product rules YouTube
  2. Examples of basic counting YouTube
  3. Examples: Product and Division rules YouTube
  4. Binomial theorem and bijective counting YouTube
  5. Counting lattice paths YouTube

Week 3

  1. Multinomial theorem YouTube
  2. Applying Multinomial theorem YouTube
  3. Integer compositions YouTube
  4. Set partitions and Stirling numbers YouTube
  5. Stirling and Hemachandra recursions YouTube
  6. Integer partitions YouTube

Week 4

  1. Young's diagram and Integer partitions YouTube
  2. Principle of Inclusion and Exclusion YouTube
  3. Applications of PIE YouTube
  4. The twelvefold way YouTube
  5. Inclusion exclusion: Linear algebra view YouTube
  6. Partial Orders YouTube

Week 5

  1. Mobius Inversion Formula YouTube
  2. Product theorem and applications of Mobius Inversion YouTube
  3. Formal power series, ordinary generating functions YouTube
  4. Application of Ordinary generating functions YouTube
  5. Product of Generating functions YouTube

Week 6

  1. Composition of generating functions YouTube
  2. Exponential Generating Function YouTube
  3. Composition of EGF YouTube
  4. Euler pentagonal number theorem YouTube

Week 7

  1. Graphs - introduction YouTube
  2. Paths Walks, Cycles YouTube
  3. Digraphs and functional digraphs YouTube
  4. Componenets, Connectivity, Bipartite graphs YouTube

Week 8

  1. Acyclic graphs YouTube
  2. Graph colouring YouTube
  3. Mycielski graphs YouTube
  4. Product of graphs YouTube
  5. Menger's theorem YouTube

Week 9

  1. System of Distinct representatives YouTube
  2. Planar graphs YouTube
  3. Euler identity YouTube
  4. Map colouring problem - history YouTube

Week 10

  1. The Discharging Method - part 1 YouTube
  2. The Discharging Method - part 2 YouTube
  3. Introduction to Group actions YouTube
  4. Colouring and symmetries - examples YouTube
  5. Burnside's lemma YouTube

Week 11

  1. Proof of Burnsides lemma YouTube
  2. Polya's theorem YouTube
  3. Species of structures- definitions and examples YouTube
  4. Associated seris and Product of species YouTube
  5. Species: Substitution and Derivative YouTube

Week 12

  1. Species: Pointing and countilg labelled trees YouTube
  2. Review and Further directions YouTube
  3. More on further topics YouTube
  4. Linear Algebra method: Ultra short introduction YouTube
  5. Probabiistic Method: Ultra short introduction YouTube

Syllabus and materials

At NPTEL, as the course publishes them.

Credits and licence

Institution
IIT Madras
Department
Mathematics
Teacher
Prof. Narayanan N
Level
Undergraduate
Language
English
Subjects
Mathematics
Source
NPTEL
Licence
CC BY-NC-SA, as NPTEL states it. Non-commercial use only. NPTEL's terms
Attribution
NPTEL states: "Distributed under Creative Commons Attribution-ShareAlike / CC BY - NC - SA", beside a BY-NC-SA badge.
Who can watch
NPTEL gives no rating. Invisible Network shows it to Tweens profiles and older, judged from what the source says about it. How courses are placed