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42 commits

Author SHA1 Message Date
Floris van Doorn
b251465e72 continue on gysin sequence 2018-11-12 13:02:20 -05:00
Floris van Doorn
94066a6ba8 some more algebra 2018-11-12 13:02:20 -05:00
Floris van Doorn
e4db64ae9a fixes after changes in the library 2018-09-10 18:04:28 +02:00
Jeremy Avigad
6e2d8807f4 get everything to compile 2017-08-21 17:05:59 -04:00
Jeremy Avigad
345c45e07c revise quotient_group 2017-08-17 17:07:10 -04:00
Jeremy Avigad
1cb3e5c658 change terminology set -> property 2017-08-17 17:07:10 -04:00
Jeremy Avigad
c74779959a base subgroups on sets and unbundle 2017-08-17 17:07:10 -04:00
Egbert Rijke
313754ee2b completed definition of k prime 2017-06-16 17:06:04 -04:00
Steve Awodey
38bff9ddb4 very small additions 2017-06-02 12:16:07 -04:00
Floris van Doorn
cea1250ca6 Work on the construction of exact couples 2017-05-21 00:39:53 -04:00
Egbert Rijke
c42c49415e image_homomorphism_square 2017-05-18 17:37:28 -04:00
Egbert Rijke
153e48d6e5 ab_image_homomorphism 2017-05-18 17:24:02 -04:00
Egbert Rijke
8382043184 ab_subgroup_iso 2017-05-18 16:44:42 -04:00
Steve Awodey
922baa9975 wip 2017-05-11 17:14:28 -04:00
Floris van Doorn
daedc1dc48 continue convergence theorem 2017-05-03 23:41:24 -04:00
Steve Awodey
6e13cb9dad small changes 2017-04-27 17:09:20 -04:00
Floris van Doorn
bb209af2e8 continue with derived couple of graded R-modules, almost finish defining the maps 2017-04-20 22:58:33 -04:00
Egbert Rijke
fd5d774e55 is_embedding_ab_subgroup_of_subgroup_incl 2017-04-20 15:45:00 -04:00
Egbert Rijke
07d775563b ab_subgroup_of_subgroup_incl 2017-04-20 14:59:55 -04:00
Floris van Doorn
ec376b407e move stuff about subgroups to subgroup 2017-04-20 14:42:54 -04:00
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)