let a be Int_position; :: thesis: for i being Integer
for n, m being Nat
for I being Program of holds
( m < (card I) + 3 iff m in dom (for-down (a,i,n,I)) )
let i be Integer; :: thesis: for n, m being Nat
for I being Program of holds
( m < (card I) + 3 iff m in dom (for-down (a,i,n,I)) )
let n, m be Nat; :: thesis: for I being Program of holds
( m < (card I) + 3 iff m in dom (for-down (a,i,n,I)) )
let I be Program of ; :: thesis: ( m < (card I) + 3 iff m in dom (for-down (a,i,n,I)) )
card (for-down (a,i,n,I)) = (card I) + 3 by Th39;
hence ( m < (card I) + 3 iff m in dom (for-down (a,i,n,I)) ) by AFINSQ_1:66; :: thesis: verum