65 Why aren't representations of monoids studied so much? 2010-08-30T04:29:16.393

27 What are the main structure theorems on finitely generated commutative monoids? 2013-05-19T00:50:21.187

26 Is there a (discrete) monoid M injecting into its group completion G for which BM is not homotopy equivalent to BG? 2013-02-18T19:34:34.677

21 Toposes (topoi) as classifying toposes of groupoids 2011-12-24T00:12:21.227

20 Mapping from a finite index subgroup onto the whole group 2012-03-02T08:34:29.167

20 Extending $\Bbb N$ to a semiring with isomorphic additive and multiplicative structure 2017-07-16T13:00:30.133

19 Homological Algebra for Commutative Monoids? 2009-10-13T16:23:02.830

16 Exact sequence of monoids 2011-12-09T22:36:35.133

15 Why semigroups could be important? 2011-02-18T18:09:34.150

15 Is the category of smooth manifolds equivalent to the opposite category of the category of commutative monoids of some additive symmetric monoidal category? 2011-09-30T16:43:38.983

13 Recovering a monoidal category from its category of monoids 2009-10-29T19:34:30.273

13 How do you compute the space of lifts of an E-infinity map? 2010-02-15T21:37:03.393

13 The symmetric monoidal category of finite sets 2013-01-03T09:58:54.170

12 Model Structure/Homotopy Pushouts in topological monoids? 2010-01-07T19:01:00.177

12 Is every simply connected finite complex the classifying space of a finite monoid 2016-03-10T06:39:21.970

11 Why is a monoid with closed symmetric monoidal module category commutative? 2010-02-09T21:13:01.950

11 Monoids with infinite products 2010-09-08T18:29:09.070

11 Is the following construction of the 0-Hecke monoid (well) known? 2011-11-21T18:59:15.570

11 Identifying a group without 2-torsion 2017-05-24T17:50:42.383

10 Computing the structure of the group completion of an abelian monoid, how hard can it be? 2010-02-03T07:24:35.683

10 Adding a formal inverse of an element to a free monoid 2010-11-16T00:46:11.807

9 The concept "conjugate class" in monoids. 2011-01-14T19:12:25.997

9 Reference for a generalization of Γ-spaces to monoidal model categories 2014-01-16T16:01:12.907

9 Inductive and reducible functions 2017-04-17T01:55:27.160

9 Detecting/Characterising positive elements in free groups 2017-07-10T17:32:09.920

8 Structure Theorem for finitely generated commutative cancellative monoids? 2010-06-20T08:08:56.380

8 Give an example of monoid with property $m^2 = m^3$ 2010-12-13T11:10:47.470

8 Is there a general result that theorems about finite structures proved in ZFC can be proved in ZF? 2012-04-06T13:53:58.087

8 Connective spectra versus simplicial abelian groups - very basic question 2012-04-24T14:49:45.300

8 An operation on binary strings 2013-05-23T09:28:58.790

8 Über theorem on unavoidable patterns? 2014-07-19T00:37:24.457

8 Category without identities? 2016-12-08T12:56:21.757

8 What's the cokernel of a monoid homomorphism? 2016-12-12T00:20:44.397

7 Lattice-ordered commutative monoids 2010-11-13T18:09:13.810

7 Cones, monoids, and the space of (very) ample divisors 2011-03-31T12:45:20.890

7 Powers of maps on finite sets 2011-05-30T18:28:25.770

7 What is the free monoidal category generated by a monoid? 2012-12-05T17:00:20.123

7 Does every commutative monoid admit a translation-invariant measure? 2013-02-12T19:31:48.430

7 Question about topological monoid maps 2013-04-14T06:17:03.373

7 When $X \times Y \cong X \times Z$ implies $Y \cong Z$ (in the category of finite topological spaces) 2017-05-11T19:37:15.783

6 Torsors for monoids 2010-05-25T10:33:02.507

6 Growth zeta-functions of regular languages 2011-06-21T19:40:50.330

6 Duality between conjugacy classes and irreducible characters for finite monoids? 2012-07-23T14:32:56.940

6 Functionals on oriented matroids 2013-08-07T15:26:01.213

6 Laurent and power series over the field with one element? 2015-09-15T17:16:56.847

6 Monoids in which every prime is an atom 2017-04-02T21:33:17.350

6 For which abelian groups $G$ does the monoid of zero-sum sequences over $G$ embed into a ring as a divisor-closed subsemigroup? 2017-07-25T08:31:52.713

6 Nielsen-Schreier theorem for monoids 2017-12-07T18:22:11.527

5 Chain/Hierarchy of Monoids 2010-05-15T10:45:40.030

5 Representations of products of groups (and monoids) 2010-07-30T03:55:13.897

5 If $k[S]$ is noetherian, is S finitely generated? 2010-11-04T15:20:07.127

5 Do all finitely generated nilpotent semigroups have polynomial growth? 2011-05-30T19:07:14.583

5 When is the cofibrant replacement of a product the product of the cofibrant replacements? 2011-08-25T22:02:20.233

5 flat maps of monoids which are not localizations 2012-02-21T02:34:32.840

5 Locally finite varieties which are not finitely generated 2014-03-19T19:33:50.637

5 What is the combinatorial data classifying non-normal affine toric varieties? 2014-03-25T13:40:15.477

5 Orbit-Stabilizer theorem for continuous groups 2014-06-13T00:03:01.010

5 Have semigroups with actions on themselves that have a dual to the compatibility axiom ever been studied? 2016-06-25T08:10:03.383

5 Can the trivial module be stably free for a monoid ring? 2016-08-26T13:32:42.800

5 Descent of flatness from algebras to monoids 2016-10-31T13:28:13.880

5 Terminology for a monoid $H$ s.t. $xy \in H^\times$ only if $x, y \in H^\times$ 2017-02-11T20:43:03.760

5 The smallest number of vertices for a graph with the same endomorphism monoid 2017-02-27T08:20:53.453

5 On the factorization of powers of atoms in the ring of integers of a number field 2017-06-12T09:44:32.040

5 Derived tensor products and Tor of commutative monoids 2017-08-10T14:21:06.107

4 Associative binary operations on natural numbers 2010-07-09T11:51:31.497

4 Membership problem in monoids 2010-08-29T19:33:02.157

4 Invertible elements in monoid rings of unital monoids without non-trivial invertible elements 2010-10-23T10:48:08.020

4 Is the radical of a homogeneous ideal homogeneous? 2011-11-22T17:26:32.870

4 What is the pro-algebraic completion of the free semigroup on one generator? 2011-12-18T04:48:31.977

4 Is there a homological way to compute quiver presentations? 2012-03-08T04:38:12.260

4 Why do we choose the standard total order on the integers? 2013-02-27T20:10:27.270

4 Progress on group languages characterizations 2013-10-14T10:47:26.433

4 Concatenation of strings 2013-11-02T10:48:31.820

4 What is the formula for the commutative multiplication on CP(infinity)? 2013-11-22T00:57:14.527

4 Correspondence between numerical semigroups and polynomials? 2014-03-26T17:59:50.593

4 Embedding a linearly ordered free monoid into a linearly ordered group 2014-04-09T15:00:49.117

4 Is the monoid of taking iterated images and inverse images freely generated by the image and inverse image operation? 2014-07-06T19:24:34.587

4 Does the category PCM (partial commutative monoids) have a closed symmetric monoidal product? 2014-07-14T09:20:03.903

4 Pseudovarieties of monoids 2014-10-09T17:19:28.760

4 Catenarity of monoid algebras 2015-07-29T08:54:11.610

4 group completion theorem of homology as Hopf algebras 2015-08-21T12:51:01.637

4 Directed homotopy in the Cayley graph of a monoid 2016-01-01T20:05:05.577

4 Projective resolutions for commutative monoids 2016-03-02T11:00:28.480

4 Pushouts of injective monoid homomorphisms 2016-09-11T10:11:58.490

4 Homological questions on monoid algebras 2016-09-21T20:00:02.600

4 Values attained by the coheight of $(H \setminus H^\times)^k$ as a function of $H$ and $k$ 2017-04-24T00:01:51.827

4 Which monoids can be realized as the monoid of ideals of a commutative monoid? 2017-04-25T08:15:50.450

4 Short proof a monoid is a group iff every splitting is right homogeneous 2017-05-03T08:10:21.120

4 Representing meet-semilattices with vector spaces of specified dimensions 2018-03-07T22:26:02.417

3 Vocabulary on monoid periodicity 2010-07-17T02:53:47.857

3 What is the relation between the number syntactic congruence classes, and the number of Nerode relation classes? 2010-07-22T04:53:17.483

3 Can cones (toric monoids) be built as colimits of their faces? 2011-04-13T21:23:02.747

3 submonoid of a matrix monoid with a common eigenvector 2011-10-06T08:56:58.863

3 Semiring naturally associated to any monoid? 2013-02-21T13:00:04.163

3 determine if a toric variety is Gorenstein 2013-09-14T21:08:06.867

3 Monoids and groups of fractions 2013-10-29T17:30:52.070

3 Are algebraic structures uniquely identifed by their free objects? 2014-01-25T20:14:57.147

3 Cosets of the fixer of an action of a monoid on a finite set 2014-11-01T11:56:28.577

3 group completion theorem by using homology fibrations 2015-07-02T01:37:09.190