---------- Forwarded message ---------- From: Aneta Buraczyńska <an.buraczyn...@gmail.com> Date: Mon, Dec 29, 2014 at 11:03 PM Subject: error in Sage To: William Stein <wst...@gmail.com>
Dear Mr William Stein, I am writing with request for contact to Sage creators or reading my problem. In module sage.crypto.boolean_function there is a function: walsh_hadamard_transform(). I think this function gives wrong results. For instance for function f defined by truth table (1, 0, 0, 0, 0, 1, 1, 1) sage gives vector (0, 0, 0, 0, -4, 4, 4, 4) as a result, but the correct value is (0, 0, 0, 0, 4, -4, -4, -4). All functions that I verified have in sage error result due to incorrect signs. On appendix I send a document with the calculations showing my statement. I will be grateful for help in this problem. Yours Sincerely, Aneta Buraczyńska -- William Stein Professor of Mathematics University of Washington http://wstein.org -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
calculations.pdf
Description: Adobe PDF document
