An introduction to mathematics, by A. N. Whitehead.

FUNCTIONS 153
Shakespeare's Cliff by Dover in contemplation of the Milky Way, would be dead before
he had had time to rearrange his ideas as
to the necessity of caution in scientific
conclusions.
It is very easy to find a discontinuous
function, even if we confine ourselves to the
YP,3
P4
P2 y~
Fig. Q1.
simplest of the algebraic formula. For exi
ample, take the function of y = -, which we
have already considered in the form p= -,
where v was confined to positive values. But