Sentence 1: MacCullagh found that a conventional potential function proportional to the squared norm of the displacement field was incompatible with known properties of light waves .
Sentence 2: MacCullagh found that a squared function that is proportional to the known norm of the shift field was incompatible with conventional potential properties of light waves .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?