The 3-tuple (45, 20, 15) as a set

An n-tuple (x1,...,xn) is an ordered list of n sets. It can be constructed in several ways. A popular definition is the original set x1 for n=1 and the ordered pair ((x1,...,xn-1),xn) otherwise.

Klick on the ordered pair ( 45, 20 ) or the natural number 15 to see how it may be defined as a set.

(45, 20, 15) = ( ( 45, 20 ), 15 )

(back to √2)