defpred S1[ object ] means ( p in loc D & \$1 = ColD . p );
deffunc H1( object ) -> Element of NAT = ((m . p) . (In (\$1, the ColoredSet of CPN))) + 1;
deffunc H2( object ) -> Element of NAT = (m . p) . (In (\$1, the ColoredSet of CPN));
P1: for x being object st x in the ColoredSet of CPN holds
( ( S1[x] implies H1(x) in NAT ) & ( not S1[x] implies H2(x) in NAT ) ) ;
consider f being Function of the ColoredSet of CPN,NAT such that
P2: for x being object st x in the ColoredSet of CPN holds
( ( S1[x] implies f . x = H1(x) ) & ( not S1[x] implies f . x = H2(x) ) ) from take f ; :: thesis: for x being Element of the ColoredSet of CPN holds
( ( p in loc D & x = ColD . p implies f . x = ((m . p) . x) + 1 ) & ( ( not p in loc D or not x = ColD . p ) implies f . x = (m . p) . x ) )

thus for x being Element of the ColoredSet of CPN holds
( ( p in loc D & x = ColD . p implies f . x = ((m . p) . x) + 1 ) & ( ( not p in loc D or not x = ColD . p ) implies f . x = (m . p) . x ) ) :: thesis: verum
proof
let x be Element of the ColoredSet of CPN; :: thesis: ( ( p in loc D & x = ColD . p implies f . x = ((m . p) . x) + 1 ) & ( ( not p in loc D or not x = ColD . p ) implies f . x = (m . p) . x ) )
( ( S1[x] implies f . x = H1(x) ) & ( not S1[x] implies f . x = H2(x) ) ) by P2;
hence ( ( p in loc D & x = ColD . p implies f . x = ((m . p) . x) + 1 ) & ( ( not p in loc D or not x = ColD . p ) implies f . x = (m . p) . x ) ) ; :: thesis: verum
end;