The Brauer-Manin obstruction and Sha[2]

M.J. Bright, N. Bruin, E.V. Flynn and A. Logan

groups (Adam Logan): A text file explaining step 2d of the algorithm (Section 3).

brauer.tar.gz (Adam Logan): Magma programs to compute Brauer-Manin obstruction on a degree 4 Del Pezzo surface.

transcript (Nils Bruin): Transcript of computations involving visibility of Sha[2] in the Jacobian of a genus 4 curve.