#14076: Update ChomP to latest upstream version (compilation failure)
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Reporter: cnassau | Owner: tbd
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.11
Component: packages: optional | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Volker Braun | Merged in:
Dependencies: #14595 | Stopgaps:
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Comment (by vbraun):
ChomP actually uses `(0,1,-1)` as `Z_2` generator and `(0,0,1)` as free
generator, we are mixing up the free and torsion part:
{{{
sage: c.homology(verbose=True, generators=True)
Chain complex over Integer Ring
Popen called with arguments ['homchain',
'/home/vbraun/.sage/temp/laptop/5244/tmp_ZZ8Q1j', '',
'-g/home/vbraun/.sage/temp/laptop/5244/tmp_zVMC6I']
CHomP output:
HOMCHAIN, ver. 2.08, 10/07/04. Copyright (C) 1997-2013 by Pawel Pilarczyk.
This is free software. No warranty. Consult 'license.txt' for details.
[Tech info: chain 24, addr 8, intgr 2.]
Reading a chain complex from
'/home/vbraun/.sage/temp/laptop/5244/tmp_ZZ8Q1j'...
Time used so far: 0.00 sec (0.000 min).
The ring of coefficients is the ring of integers.
Computing the homology of the chain complex...
Reducing D_2: 0 + 2 reductions made.
Reducing D_1: 0 + 0 reductions made.
H_0 = Z
H_1 = Z_2 + Z
Writing the homology generators of CX to
'/home/vbraun/.sage/temp/laptop/5244/tmp_zVMC6I'...
Total time used: 0.00 sec (0.000 min).
Thank you for using this software. We appreciate your business.
End of CHomP output
Generators:
; This file contains the generators of the homology module
; of the chain complex read from the file
'/home/vbraun/.sage/temp/laptop/5244/tmp_ZZ8Q1j'.
[H_0]
a1
[H_1]
a2 - a3
a3
[H_2]
('0', 'Z')
dimension = 0, number of factors = 1, invariants = [0]
raw generators: ; This file contains the generators of the homology module
; of the chain complex read from the file
'/home/vbraun/.sage/temp/laptop/5244/tmp_ZZ8Q1j'.
[H_0]
a1
[H_1]
a2 - a3
a3
[H_2]
('1', 'Z_2 + Z')
dimension = 1, number of factors = 2, invariants = [2, 0]
raw generators: ; This file contains the generators of the homology module
; of the chain complex read from the file
'/home/vbraun/.sage/temp/laptop/5244/tmp_ZZ8Q1j'.
[H_0]
a1
[H_1]
a2 - a3
a3
[H_2]
{0: (Z, [(1)]), 1: (Z x C2, [(0, 1, -1), (0, 0, 1)])}
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14076#comment:14>
Sage <http://www.sagemath.org>
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