(1/2003-1)(1/2002-1)(1/2001-1)...*(1/1001-1)(1/1000-1)

(1/2003-1)(1/2002-1)(1/2001-1)...*(1/1001-1)(1/1000-1)

0

Product of (1/2001-1) x (1/2000-1) x (1/1999-1)...(1/1001-1) x (1/1000-1)

0