theorem Th29: :: CATALG_1:29

for C being Category
for a, b, c being Object of C
for x being set holds
( x in Args ((compsym (a,b,c)),(MSAlg C)) iff ex g, f being Morphism of C st
( x = <*g,f*> & dom f = a & cod f = b & dom g = b & cod g = c ) )