Let X := {(a(n)): summation|a(n)| < infinity{ be the space of absolutely convergent
sequences. Define the? l1 and l(infinity) metrics on this space by
d(l1)(a(n), b(n)) := summation |a(n) - b(n)|
where n=0 at first and goes to n = infinity.
d(l(infinity))(a(n), b(n)) := sup|a(n) - b(n)|
I hope...