Non-Axisymmetric Needle Crystals
Idea: Compute correction to Ivantsov relation S = P eP E1(P) due to 4-fold deviation from a parabola of revolution.
Key ingredients:
• Glicksman et al. have measured the deviation S - P eP E1(P)
• LaCombe et al. have also measured the shape deviation [1995].
• Horvay & Cahn [1961] found an exact needle crystal solution with 2-fold symmetry, exhibiting an amplitude-dependent deviation in   S - P eP E1(P) [but wrong sign to account for 4-fold data …]
Fern and Antii – matrix plot of sequences up to 10 proteins long – GENBANK
Fern and Tony – reconstructing a genetic sequence from an incomplete sequence with gaps and deletions