Chapter 0 Disclaimers and Warnings

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  These notes are highly incomplete, not well-written, not well ’latexed’ and not meant to be taken seriously like a book.

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  The notes might fail on many aesthetic counts and I have put little effort in this direction.

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  These are written for the introductory course on Graph Theory and Discrete Mathematics-I to second year undergraduate students.

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  All figures are taken from various sources and sorry for not acknowledging them all.

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  I am thankful to students of the course in the years 2018, 2019 and 2022 for pointing out errors, inaccuracies and also listening to my lectures :-)

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  Unless mentioned, the proofs or results are all borrowed from some book or the other. Few of them are listed in the bibliography.

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  Do not look for any new results or proofs or something else fancy here. Just stuff arranged according to my own teaching convenience.

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  I have tried to mention some related research-level questions and/or directions at the end of each chapter.

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  The main references are [Jukna 2011, Bollobas 2013, Van Lint and Wilson, West 2001, Diestel 2000, Jukna 2011, Sudakov 2019].

The following students have contributed to these notes: Sanchayan Bhowal of 2022 B2-batch added some proofs and many figures. From 2023 B2-batch, Ruchira Mukherjee, Nikhil Nagaria, Rinkiny Ghatak, Ashwinie Parulekar, Hrishik Koley and Shriyaa Srivastava edited various parts of the notes and also added solutions.