ρ
1
g
h
1
=
ρ
2
g
h
2
⟹
ρ
1
h
1
=
ρ
2
h
2
ρ
1
g
h
1
=
ρ
2
g
h
2
⟹
ρ
1
h
1
=
ρ
2
h
2