theorem Th35: :: INTEGR19:35

for n being Element of NAT
for X, Y being set
for f1, f2 being PartFunc of REAL,(REAL-NS n) st f1 | X is bounded & f2 | Y is bounded holds
( (f1 + f2) | (X /\ Y) is bounded & (f1 - f2) | (X /\ Y) is bounded )