NOTE ON SYMBOLS
The following symbols and abbreviations have been used in the text:
n "factorial n." n! = n (n — 1) (n — 2) ... 3.2. I, where n is a posiinteger.
n (n — 1) (n — 2) .. (n- r + ) where n maybe positive or negative,
Y(Y— I)(r—2)...3.2.1 '
integral or fractional, and r is a positive integer.
"is equivalent to." Thus E + A means that the operation
E is equivalent to the operations I + A.
"tends to the value." For example, Lt (1 + I)" is an abbre
nYmn n
viated form of "the limit of (1 + I) as n tends to infinity." \ n
J.LA. journal of the Institute of Actuaries. T.F.A. Transactions of the Faculty of Actuaries.
F.S.S. journal of the Institute of Actuaries Students' Society.