When I create a very large matrix (the threshold may be 2^32 entries) from a list of vectors, the elements are not copied over correctly. Here is a "small" example:
FF = GF(next_prime(1000000)) M = 70000 N = 80000 v1 = vector(FF, [FF(k) for k in range(N)]) v2 = vector(FF, [N] * N) vecs = [v1 + v2*FF(i) for i in range(M)] mat = matrix(FF, M, N, vecs) mat[0] == vecs[0] the last line returns "false". I understand the bug is not so easy to reproduce: the code above runs for about 40 minutes and needs about 50G of RAM. In fact, it is also strange that it takes so long: all the lines until "mat = matrix(FF, M, N, vecs)" take only about a minute. It shouldn't take so much more time to simply copy a bunch of vectors than it took to compute them. Sage version: 9.3 running on a 64 bit linux system -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/d06f39c6-f066-4e83-a2c1-2bbcba345f36n%40googlegroups.com.
