Hi. Today I have joined the forum and I wish to greet cordially all persons that frequent it. I live in Argentina and my native language is Spanish. I do not handle English as I would like, but here I am with the best will, putting all my attention. My favorite subject of physics is Maxwell's electrodynamics, which after a century and a half has nothing new to contribute ... or does it? I hope that this and other topics are the subject of fruitful dialogues. Best regards.