Re:Why isn't 1 a prime number?
by Certhas on Sunday April 28, 2019 @01:55PM
(#19772544)
It does make sense in a mathematical context though. You might write something like
p_S = \prod_{x \in S} x
And then later find out that the set S contains one element. Or it might even be the empty set in which case you'd interpret the above as equal to 1. This makes it work that
p_S = \prod_{x \in S} x
And then later find out that the set S contains one element. Or it might even be the empty set in which case you'd interpret the above as equal to 1. This makes it work that
p_{S union S'} = p_S p_S'
in all cases.