... In.Annals of Mathematics A C2-smooth counterexample to the Hamiltonian Seifert conjecture in R4 By Viktor L. Ginzburg and Bas¸ak Z. G¨urel* A C2 -COUNTEREXAMPLE TO THE HAMILTONIAN ... AND BAS¸AK Z. G¨URELedges are parallel to the coordinate axes. The product [a, b] × I2mis alwaysassumed to be embedded intoR2m+1(henceforth, the standard embedding)so that the interval ... points (a, x), the “entrance”, and (b, y), the “exit”, are on the same characteristic, thenx = y.Inother words, for a characteristic that meets both the bottomand the top of the plug, its top...