homcubes -i rep6d_f.map rep6d_x.cub rep6d_a.cub rep6d_y.cub rep6d_b.cub --log rep6d.log Start time: Thu Sep 4 07:06:08 2003 HOMCUBES, ver. 3.04, 05/09/03. Copyright (C) 1997-2003 by Pawel Pilarczyk. This is free software. No warranty. Consult 'license.txt' for details. [Tech info: cube 4, qcell 8, chain 12, addr 4, coord 2, intgr 2. PBase Ok.] Reading cubes to X from 'rep6d_x.cub'... 2136 cubes read. Reading cubes to A from 'rep6d_a.cub'... 1016 cubes read. Computing X\A... 0 cubes removed from X, 2136 left. Restricting A to the neighbors of X\A... 362 cubes removed, 654 left in A. Reading cubes to Y from 'rep6d_y.cub'... 2136 cubes read. Reading cubes to B from 'rep6d_b.cub'... 2712 cubes read. Computing Y\B... 0 cubes removed from Y, 2136 left. Verifying if X\A is contained in Y... Passed. Verifying if A is contained in B... Passed. 103705 bit fields allocated (9 MB) to speed up full-dimensional reduction. Reducing full-dim cubes from (X,A)... 180 removed, 2610 left. Reading the map on X\A from 'rep6d_f.map' for extended reduction... Done. Verifying if the image of X\A is contained in Y... Passed. Expanding A in X... 1491 moved to A, 645 left in X\A, 1798 added to B. Restricting A to the neighbors of X\A... 1316 cubes removed, 649 left in A. Reducing full-dim cubes from (X,A)... 160 removed, 1134 left. Reading the map on X\A from 'rep6d_f.map'... Done. Reading the map on A from 'rep6d_f.map'... Done. Verifying if the image of A is contained in B... Passed. Computing the image of the map... and of the inclusion... 1978 cubes. Expanding B in Y... 22 cubes moved to B, 316 left in Y\B. Restricting B to the neighbors of Y\B... 2870 cubes removed, 1662 left in A. Reducing full-dim cubes from (Y,B)... 0 removed, 1978 left. Transforming X\A into a set of cells... 645 cells created. Transforming A into a set of cells... 489 cells created. Transforming Y\B into a set of cells... 316 cells created. Transforming B into a set of cells... 1662 cells created. Collapsing faces in X and A... 141010 removed, 33160 left. There are 139010 faces of dimension up to 2 left in A. Note: The dimension of X decreased from 6 to 2. Creating the map F on cells in X... 397128 cubes added. Creating the map F on cells in A... 986009 cubes added. 237 bit fields were used. Creating a cell map for F... Done. Note: It has been verified successfully that the map is acyclic. Creating the graph of F... 894998 cells added. Adding boundaries of cells in Y and B... 50876 cells added. Forgetting 37088 cells from B. Computing the image of F... 18307 cells. Collapsing Y towards F(X)... 21946 cells removed, 29246 left. Note: The dimension of Y decreased from 6 to 3. Creating the chain complex of the graph of F... Done. Creating the chain complex of Y... Done. Creating the chain map of the projection... Done. Creating the chain map of the inclusion... Done. Vertices used: 39687 of dim 6, 211001 of dim 12. Time used so far: 7960 sec (2.2 hours) out of 30493 sec (8.5 hours). Computing the homology of the graph of F over the ring of integers... Reducing D_2: 395 + 256705 reductions made. Reducing D_1: 123729 + 58518 reductions made. H_0 = 0 H_1 = Z H_2 = Z Computing the homology of Y over the ring of integers... Reducing D_3: 5282 + 4290 reductions made. Reducing D_2: 3469 + 1581 reductions made. Reducing D_1: H_0 = 0 H_1 = Z H_2 = Z Maximal homology level considered for the map is 2. The map induced in homology is as follows: Dim 0: 0 Dim 1: f (x1) = -y1 Dim 2: f (x1) = -y1 The map induced in homology by the inclusion: Dim 0: 0 Dim 1: i (x1) = -y1 Dim 2: i (x1) = -y1 The inverse of the map induced by the inclusion: Dim 0: 0 Dim 1: I (y1) = -x1 Dim 2: I (y1) = -x1 The composition of F and the inverse of the map induced by the inclusion: Dim 0: 0 Dim 1: F (x1) = x1 Dim 2: F (x1) = x1 Total time used: 8320 sec (2.3 hours) out of 31651 sec (8.8 hours).