theorem Th76: :: DBLSEQ_3:76

for f being nonnegative Function of [:NAT,NAT:],ExtREAL
for n, m being Nat holds
( (Partial_Sums_in_cod1 f) . (n,m) >= f . (n,m) & (Partial_Sums_in_cod2 f) . (n,m) >= f . (n,m) )