1. The problem statement, all variables and given/known data Could someone give an example question in De Donder-Weyl theory (the multisymplectic theory where the hamiltonian is not parametrized by time, it's on wikipedia). 2. Relevant equations The relevant equations should not be too complicated, just complicated enough to use the multisymplectic approach. 3. The attempt at a solution I have read lots of articles on arxiv but do not understand enough of the concepts (some things look similar to clifford algebra and clifford calculus, like the orthogonality stuff). It would be very educational with an example. Please don't attack me for using the template for requesting a question, I did fill in all the headings.