INTRODUCTION TO THE THEORY
OF LIFE CONTINGENCIES

In order to follow the present international standard actuarial notation and usage, the following examples illustrate what changes should be made from the symbols in this book.

For Q use coq

   InQ   use nq

   ,n I nQ   use ,n lnq

   For Inez   use flex or exn1

   I flax   use flax or az,T

   ax   use ax

   'flax   use flax or ax,i~

   For I nA   use flA

For (T)PP) use P(m)(A,t)) (°°)Px use P(Ax)

For Nx   use Nx

Sx   use Sx

Nx   use Nx+1

Sx   use Sx+1

Before using the Nx values from a published table, one should check that it is a "modern" table by testing Nx — Nx+1 = Dx (last two digits should be enough). In particular, if D,x is the last Dx > 0, then N~ = D~ in a modern table.

In an "old" table—published generally before 1950—we find Nz — Nx+1 = D2+1 and N,o = 0. In such a table the modern value of N20 = D20 + D21 + D22 +    will be found opposite x = 19.