No it would be a theorem if it was proven.
Even more so. It's not even a theory anymore, it's a proven fact.
A Theory is unproven, but Laws are proven. Theory becomes law after that theory is proven correct.
Putting it simply, theories and ideas are not proven scientific facts, but remain as such, an idea or a theory which have yet still to be proven.
A scientific theory
It can change if it is proven wrong, or if a new theory is proven more likely to be true.
albert einstiens theory was proven. his theory was the suns light bending over the moon.
This theory has proven the existence of God
An extant theory is an idea that something is a specific way or is in existence. Extant theories are theories that have never been proven or found to be not true, so they are still viewed as a theory.
a theory.
A common theory is a theory which has not been proven or a theory without evidence.
It is a law because it is proven that motion exists and does occur in the universe. However it is still considered a theory in the case of which ways motion may be achieved.
albert einstiens theory was proven. his theory was the suns light bending over the moon.