This compact but immensely useful book is designed as a comprehensive reference and collection of frequently used formulae and definitions in Mathematics. Tabular presentation used in the book will help the readers in understanding and memorising the important terms and formulae more effectively. All important definitions are explained in a lucid and reader-friendly manner. Cross-references in the book clear all confusion and enhance understanding of various technical terms. The book will prove really useful as a ready-reference to Students, General Readers and to those who plan to appear in Various Academic or Competitive or Entrance Examinations.