Speaker: Alexander Afriat (Brest) Wednesday 30th May 2013 Ludwigstr.31 Room E021 Time: 6 to 8 pm Title: Weyl’s gauge argument Abstract: The standard U(1) “gauge principle” or “gauge argument” produces an exact potential A = dλ and a vanishing field F = ddλ = 0. Weyl has his own gauge argument, which is sketchy, archaic and hard to follow; but at least it produces an inexact potential A and a nonvanishing field F = dA ≠ 0. I attempt a reconstruction. Pre-print: http://philsci-archive.pitt.edu/9597/