theorem Th79: :: CAT_3:79

for x1, x2 being set
for C being Category
for c being Object of C
for i1, i2 being Morphism of C st x1 <> x2 holds
( c is_a_coproduct_wrt i1,i2 iff c is_a_coproduct_wrt (x1,x2) --> (i1,i2) )