39 What is a coalgebra intuitively? 2011-09-27T13:23:37.773

32 Is there an explicit construction of a free coalgebra? 2010-07-08T20:09:15.997

16 Lurie's approach to the bar-cobar adjunction 2014-12-17T23:03:19.980

15 Comodule exercises desired 2010-07-28T19:58:26.780

14 Does the Tannaka-Krein theorem come from an equivalence of 2-categories? 2010-07-03T20:06:28.980

14 What is a Homotopy between $L_\infty$-algebra morphisms 2013-08-11T16:52:53.747

13 Co-induction understanding 2009-10-16T13:41:49.797

11 Why not _co_free modules? 2010-09-08T18:36:47.337

10 Which W*-algebras are the duals of C*-coalgebras? 2012-08-26T08:08:59.380

9 cardinality of final coalgebras in Top 2009-10-19T19:25:44.990

9 Distributions on product spaces 2011-06-30T10:59:50.843

9 Connected graded involutive bialgebras (Hopf algebras) sought (for Dynkin idempotent checking) 2011-12-27T00:01:01.770

9 Primitive elements of a tensor product of bialgebras 2012-01-20T16:35:11.257

8 Is there a coalgebraic characterisation of the hyperfinite II_1 factor? 2009-10-23T15:21:07.387

8 Algebraic geometry for cocommutative corings with counit. 2009-12-16T17:25:24.223

7 A coalgebraic description of the hyperfinite II_1 revisited 2009-11-12T13:55:15.300

7 What kind of structures allow Galois descent? 2011-01-13T09:20:46.257

7 What extra conditions are necessary for the following version of Koszul duality? 2011-06-16T05:57:11.957

7 Problem with Eisenbud's Lemma "Symmetry of Diagonalization"? 2014-05-27T07:16:00.043

7 Reference for Hopf algebra applications to Feynman diagrams 2015-05-06T17:44:25.147

7 What are types of coalgebras that are more naturally described by cooperads? 2016-05-26T08:58:14.627

6 Maps between sets and coalgebras 2012-03-04T19:00:03.527

6 Reference for Lie coalgebras needed 2012-03-28T03:06:07.937

6 Cofree Lie Coalgebra 2014-11-16T18:05:46.713

5 "Question-answer" bisimulation 2010-07-16T14:50:20.847

5 A special class of regular languages: "circular" languages. Is it known? 2011-01-11T14:54:42.263

5 Coderivations of S(V) correspond to linear maps S(V) -> V. Only over characteristic 0? 2011-08-05T12:07:07.940

5 Free cocommutative commutative Hopf monoids 2013-01-15T16:56:19.637

5 A coalgebra structure on compact operators 2014-11-09T16:21:05.973

5 Category of bicomodules of a cosemisimple Hopf algebra 2017-01-10T17:04:02.790

5 What are regular epimorphisms of coalgebras? 2017-03-24T17:20:27.403

4 Analogue Bialgeras vs Lie bialgebras 2011-03-14T17:04:04.210

4 Reference for Tensors on graded spaces needed 2012-02-25T18:34:19.017

4 Mistake in Wikipedia Entry "Coalgebra" 2012-06-01T16:00:22.623

4 A terminal coalgebra of a certain functor on Mes 2013-02-14T13:33:49.653

4 Injectivity criterion for surjective coalgebra maps: does it hold in full generality? 2013-08-25T10:01:57.533

4 Explicit description of graded (counital) cofree cocommutative coalgebras 2014-08-09T04:24:43.360

4 Meaning of coinvariants of a comodule 2017-04-03T04:44:22.547

3 Maximal subcoalgebras of an $F+1$-coalgebra corresponding to an $F$-coalgebra 2010-09-08T08:14:04.243

3 Is the bar construction of a CDGA model a Hopf algebra model for the loop space? 2016-02-05T09:29:17.607

3 Cocommutativity, comultiplication and coalgebra maps 2016-09-06T17:41:11.090

3 On a dual of Kaplansky's $2^{nd}$ conjecture: admissible algebras? 2017-01-08T04:04:22.753

3 Confusion about comodules 2017-03-27T03:10:49.570

3 What are the primitive elements in a polynomial Hopf algebra with primitive indeterminates? 2017-11-09T12:23:43.753

3 A diagram for understanding action/coaction compatibility in a Yetter-Drinfeld module 2018-01-23T16:14:25.707

2 In which categories is every coalgebra a sum of its finite-dimensional subcoalgebras? 2010-07-03T15:53:50.373

2 How to work with co-multiplication? 2010-10-24T14:16:14.330

2 Is there a simple description of the indecomposable dg cocommutative coalgebras? 2011-03-08T02:19:30.040

2 (Non trivial) coidempotents(Co-$K$-theory) 2014-04-14T18:44:20.297

2 When is an exponential functor a bialgebra? 2014-07-30T13:44:07.117

2 Variant of co-Tor in a bimodule category 2018-03-10T22:01:51.783

1 Linear functional kills all primitives of a connected filtered coalgebra => it lies in m^2? 2011-11-22T20:15:34.430

1 Reference for the fact that a coderivation of the (non reduced) tensor coalgebra is determined by its corestrictions 2011-12-28T18:36:37.460

1 (Co)Universal Property of Quotients/Subs 2012-06-01T04:23:24.983

1 Coinduction and corestriction are quasi-inverse equivalences for comodules? 2012-10-12T16:55:53.120

1 Why the preimage rather than image in Stone-type dualities. 2013-01-09T23:28:18.367

1 Difference between two definitions of graded coalgebra 2015-07-11T09:33:58.253

1 An identity satisfied by "Differentiation" 2015-08-20T17:59:11.320

1 Definition of a cosemisimple Hopf algebra 2016-04-13T11:27:37.830

0 How is the coradical filtration defined? 2010-12-21T09:58:22.477

0 Is Khovanov's Frobenius algebra self-dual over the integers? 2013-05-30T10:13:35.603

0 Yetter-Drinfeld modules as rigid category 2015-07-16T08:42:47.817

0 bialgebras on quotient polynomials 2015-12-14T04:59:50.913

0 Bimodule homomorphism from left and right module homomorphism 2017-10-27T09:11:04.323

-1 Finite dual of an algebra morphism. 2010-11-03T22:09:20.713