theorem Th34: :: GRCAT_1:34

for UN being Universe
for f being Morphism of (GroupCat UN)
for f9 being Element of Morphs (GroupObjects UN)
for b being Object of (GroupCat UN)
for b9 being Element of GroupObjects UN holds
( f is strict Element of Morphs (GroupObjects UN) & f9 is Morphism of (GroupCat UN) & b is strict Element of GroupObjects UN & b9 is Object of (GroupCat UN) )