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22 commits

Author SHA1 Message Date
Floris van Doorn
aefc8eccc1 define submodules, quotient modules and homology of module morphisms 2017-04-13 20:39:04 -04:00
Egbert Rijke
159ea323ab SES_hom extension lemma 2017-02-16 22:26:06 -05:00
Floris van Doorn
c0b7740f13 order of arguments in group.mk has changed 2017-02-02 17:16:14 -05:00
Steve Awodey
271459d533 image of a surjection is the codomain 2017-01-26 16:44:49 -05:00
Floris van Doorn
7f6752e14f Show that the Eilenberg-MacLane-space-functor induces an equivalence of categories 2017-01-14 21:05:34 +01:00
Steve Awodey
c814534104 First Isomorphism Theorem for AbGroups
with prelim.s
2016-12-08 16:20:14 -05:00
Egbert Rijke
d3cba4b95d simplifty the trivial subgroup 2016-12-01 15:43:05 -05:00
Egbert Rijke
de641aac71 fix 2016-12-01 14:41:36 -05:00
Egbert Rijke
c0a6e581e6 Merge branch 'master' of https://github.com/cmu-phil/Spectral 2016-12-01 14:39:23 -05:00
Egbert Rijke
652ef70739 some work, I guess 2016-12-01 14:39:10 -05:00
Floris van Doorn
b08457c77f move things to the Lean library, and update after changes in the Lean library 2016-11-24 00:11:55 -05:00
Floris van Doorn
9df0b25ae5 some additions to the smash product and direct sums 2016-11-14 14:44:29 -05:00
Egbert Rijke
ec6c4d8339 image_incl_eq_one 2016-11-10 16:25:00 -05:00
Egbert Rijke
7ab6eafc3c image of an abelian group is abelian 2016-11-03 23:30:44 -04:00
Egbert Rijke
699531a74c Merge branch 'master' of https://github.com/cmu-phil/Spectral 2016-11-03 16:42:22 -04:00
Egbert Rijke
81e6c07f23 progress on derived exact couples 2016-11-03 16:42:12 -04:00
Floris van Doorn
704717e9ae minor changes 2016-11-03 15:34:06 -04:00
Egbert Rijke
b57eadc56a image of a boundary is subgroup of the kernel 2016-10-27 15:52:47 -04:00
Floris van Doorn
29bf3bdd8e clean-up in imports/opens of the files in the algebra folder 2016-10-13 16:02:04 -04:00
Ulrik Buchholtz
f826a7a711 complete is_full_subgroup 2016-09-15 15:06:54 -04:00
Ulrik Buchholtz
22d8fad087 complete is_trivial_subgroup 2016-09-15 15:04:20 -04:00
Floris van Doorn
17d76bdb31 rename group_basics to subgroup 2016-09-14 17:31:52 -04:00
Renamed from algebra/group_basics.hlean (Browse further)