Syllabus
- Counting
- Generating functions
- Recurrence relations
Book
Video
Web Links
- IITM link for counting
- Generating Functions including problems
- Solving recurrence using characteristic polynomial
- Inclusion-Exclusion Principle
Previous Year Questions
http://gateoverflow.in/tag/combinatory
Important Questions
http://gateoverflow.in/blog/17/important-questions-in-combinatory
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