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🔣Discrete Mathematics

Functions

Injective, surjective, bijective functions, composition, inverse, and pigeonhole principle.

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What You Will Learn in Functions

Injective, surjective, bijective functions, composition, inverse, and pigeonhole principle.

  • ✅ Concept explanations with examples
  • ✅ Key formulas and definitions
  • ✅ Solved practice problems
  • ✅ Important exam questions
  • ✅ Quick revision summary

Download Functions PDF Notes

Get the complete Functions notes as a PDF — free for enrolled students, or browse our public study materials library.

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Frequently Asked Questions — Functions

What is Functions in Discrete Mathematics?
Injective, surjective, bijective functions, composition, inverse, and pigeonhole principle.
How do I prepare Functions for exams?
To master Functions, start by reading the theory carefully, then go through solved examples step by step. Practice numericals (if applicable), revise key formulas, and attempt previous year questions. SII notes cover all these aspects in a structured manner.
Are these Functions notes free?
Yes! SII provides free access to Functions notes and introductory study materials. Enrolled students get full access to detailed notes, solved papers, and live doubt-clearing sessions.
Which exams ask questions from Functions?
Functions is an important topic tested in B.Tech, BCA, BSc CS board exams. It frequently appears in both short-answer and long-answer sections.