The 3-tuple (74, 0, 20) as a set

An n-tuple (x₁,...,x_n) 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,...,x_n-1),x_n) otherwise.

Klick on the ordered pair ( 74, 0 ) or the natural number 20 to see how it may be defined as a set.

(74, 0, 20) = ( ( 74, 0 ), 20 )

(back to √2)