Month: December 2017

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So far, I haven’t found a 47-coloring of the 500-vertex graph known as DSJC500.5, part of the DIMACS challenge on cliques and coloring (1990’s)… C source code (based on Moalic & Gondran paper): #include <stdio.h> #include <stdlib.h> #include <math.h> #define MAX_VERTEX 600 #define MAX_COLORS 60 #define NUMITER 8007 unsigned char adj_mat[MAX_VERTEX][MAX_VERTEX]; int Gamma[MAX_VERTEX][MAX_COLORS]; int tabu_list[MAX_VERTEX][MAX_COLORS];… Continue reading Program for heuristic rope team graph coloring

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“Helena” started a conversation with me via Twitter, that moved in part to cellphone/smartphone SMS messages (not included), and this over a period of three days. At one point, she wanted to pawn antiquities to me in exchange for $35,000 . I asked to speak with her in person, but this couldn’t be arranged. I… Continue reading “Helena” started a conversation with me via Twitter and…