Contents
 1 Introduction
 2 Definitions and Notations
  2.1 Exercises in the Sigma Notation
  2.2 Formal Definition
  2.3 Extensions
   2.3.1 A list of (indexed) expressions
   2.3.2 Index Sets as Expressions
   2.3.3 Compound Index Notation
  2.4 Exercise 1:
   2.4.1 Indexed index sets
   2.4.2 Ordering
 3 Index Notation in LPL
 4 A Complete Problem: Exercise 2
 5 Data for Exercise 2
 6 An Optimizing Problem Version
  6.1 Version 1: the easy problem
  6.2 Version 2: Limit Capacity
  6.3 Version 3: with Setup Costs
 7 Conclusion
 References