> continuous symmetry (you can translate by any amount in any direction) Thanks for the definition. That is close to the math idea of automophic, that is, can

> continuous symmetry (you can translate by any amount in any direction) Thanks for the definition. That is close to the math idea of automophic, that is, can map onto itself. So, what physics means is that translations are essentially automorphisms. Simple now that we have a clear definition!