15.1 Sharing and Equality

      15.1.1 Re-Examining Equality

      15.1.2 The Cost of Evaluating References

      15.1.3 Notations for Equality

      15.1.4 On the Internet, Nobody Knows You’re a DAG

      15.1.5 It’s Always Been a DAG

      15.1.6 From Acyclicity to Cycles

    15.2 The Size of a DAG

      15.2.1 Stage 1

      15.2.2 Stage 2

      15.2.3 Stage 3

      15.2.4 Stage 4

      15.2.5 Stage 5

      15.2.6 What We’ve Learned

      15.2.7 More on Value Printing: An Aside from Racket