This is a common belief and true of many discrete models because they violate symmetries, but that is not true of all discrete models: A Noether Theorem for di

This is a common belief and true of many discrete models because they violate symmetries, but that is not true of all discrete models: A Noether Theorem for discrete Covariant Mechanics, https://arxiv.org/abs/1902.08997 https://arxiv.org/abs/1902.08997