Tag: lattices

67 How do the compact Hausdorff topologies sit in the lattice of all topologies on a set? 2010-02-19T21:09:20.417

37 Good lattice theory books? 2010-02-06T01:29:08.493

36 A group-theoretic perspective on Frankl's union closed problem 2014-01-09T03:49:25.763

35 Counterexamples in universal algebra 2014-01-09T02:51:35.187

30 Polar body of a convex body that avoids a lattice 2010-08-05T09:31:36.823

28 Is there an Ehrhart polynomial for Gaussian integers 2014-05-12T01:46:47.603

28 Understanding sphere packing in higher dimensions 2016-04-05T10:20:26.620

24 Gossip about Grothendieck and distributive lattices 2010-09-18T23:17:02.817

22 Was lattice theory central to mid-20th century mathematics? 2013-12-02T02:41:37.520

21 Given a lattice L with n elements, are there finite groups H < G such that L $\cong$ the lattice of subgroups between H and G? 2012-01-15T09:32:23.100

20 Codes, lattices, vertex operator algebras 2011-05-11T14:01:30.100

19 What exactly is the relationship between codes over finite fields and Euclidean sphere-packings? 2009-12-24T17:15:51.610

19 How random are unit lattices in number fields? 2010-10-10T22:28:35.793

19 Why is the right permutohedron order (aka weak order) on $S_n$ a lattice? 2014-02-28T02:58:35.367

17 A Priori proof that Covering Radius strictly less than $\sqrt 2$ implies class number one 2011-07-04T04:25:59.027

17 Is the ball reducible in some high dimension? 2012-06-27T17:50:45.683

17 Number of matrices with given Smith normal form 2015-04-30T08:09:56.733

16 The latice spanned by $m$ random 0-1 vectors of length $n$ 2012-07-03T17:45:53.643

16 Existence of a faithful irreducible representation using Möbius function 2017-03-10T14:05:52.987

15 Proving that a poset is a lattice 2010-09-28T17:19:24.720

15 Maximal number of maximal subgroups 2012-08-15T12:13:11.143

15 Why are two "random" vectors in $\mathbb R^n$ approximately orthogonal for large $n$? 2016-08-28T12:01:01.897

15 Polynomials leaving invariant the Gaussian integers 2017-07-24T04:15:02.697

14 Counting lattice points inside a three-dimensional ellipsoid 2016-02-28T20:08:47.437

13 Sublattices of Young's Lattice 2010-12-03T08:22:08.537

13 How is the Ising model an example of a lattice model as per Kontsevich? 2011-05-04T21:48:57.103

13 Giving $Top(X,Y)$ an appropriate topology 2013-04-17T12:31:38.257

13 Lattice points and convex bodies 2013-11-20T12:38:39.217

13 Conjecture regarding closest point inside a discrete ball to a line 2014-11-22T14:13:34.813

13 On (a generalization of) the Gauss Circle Problem 2015-12-29T20:34:59.390

13 in search of a transformation between determinants 2016-12-31T03:32:24.420

13 Counting primitive lattice points 2018-04-20T13:49:14.480

12 When are Ehrhart functions of compact convex sets polynomials? 2010-06-08T01:04:37.273

12 Connes & Marcolli: Q-lattices generalize Conway's "Understanding groups like $\Gamma_0(N)$" 2011-07-10T14:41:24.733

12 discrete subgroups of Lie groups and actions on homogeneous spaces 2013-03-01T20:31:36.583

12 orbits of automorphism group for indefinite lattices 2013-10-23T20:46:20.567

12 Inequality regarding sum of gaussian on lattices 2014-03-16T02:50:53.943

12 Generalization of a theorem of Øystein Ore in group theory 2014-08-28T00:25:32.710

12 Who first showed that $SL(n,O_K)$ is a lattice for a number ring $O_K$? 2014-09-28T19:10:56.237

12 2-dimensional sublattices with all vectors having very big square (in absolute value) 2015-08-25T19:56:32.730

11 Niemeier lattices and theta functions 2011-04-18T01:08:05.853

11 Defining measures over frames in place of $\sigma$-algebras 2012-10-24T05:46:30.073

11 Is it possible to completely embed complete Heyting Algebras into upsets of a poset? 2018-03-08T16:03:12.367

10 A "round" lattice with low kissing number? 2009-10-23T18:00:22.143

10 Which lattices have more than one minimal periodic coloring? 2010-01-11T18:20:00.407

10 Localic locales? Towards very pointless spaces by iterated internalization. 2011-02-06T03:29:33.720

10 The Number of Short Vectors in a Lattice 2011-07-23T06:11:09.063

10 The Gauss circle problem on a hexagonal lattice 2012-10-13T04:38:37.323

10 Concrete examples of noncongruence, arithmetic subgroups of SL(2,R) 2013-05-08T07:34:11.283

10 What are the homological properties of Young's lattice? 2013-08-12T16:07:20.880

10 Inequalities for averaging over partially ordered sets 2013-12-06T09:58:34.787

10 Is a distributive lattice planar iff it admits no B3 sublattice? 2015-02-21T18:53:06.583

10 24 vectors in Leech lattice having scalar product $\frac{1}{4}$ pairwise 2017-03-16T20:10:42.820

10 Positive integer combination of non-negative integer vectors 2017-10-08T20:52:49.253

10 Approximate volume computation and lattice point enumeration - hardness 2017-10-14T07:13:14.613

10 Is the "Ramond sector" invariant of a 3-framed lattice always divisible by 24? 2018-03-21T16:25:04.217

9 Elliptic Curves, Lattices, Lie Algebras 2009-10-24T15:27:50.040

9 Models with SLE scaling limit 2009-12-10T18:12:12.143

9 Condition for existence of certain lattice points on polytopes 2010-01-27T03:48:58.640

9 Which finite nonabelian groups have long chains of subgroups as intervals in their subgroup lattice? 2011-04-21T05:35:58.827

9 Ellipsoids and lattices: an enclosure problem. 2012-02-08T20:12:58.297

9 Reference request: Ehrhart's conjecture on the geometry of numbers 2012-02-10T22:24:54.037

9 Lattice in a certain Lie group 2012-12-05T04:03:43.747

9 Applications of n-dimensional crystallographic groups 2013-03-10T22:34:29.837

9 Is the image of an $S$-arithmetic subgroup under a surjective $k$-morphism $S$-arithmetic? 2016-07-04T11:46:31.167

9 Chromatic number of Voronoi diagrams of lattices 2017-04-11T14:28:23.153

9 Is there a reason nice coset representatives exist for Leech or E_8 lattice modulo 2? 2017-06-22T21:51:36.863

9 How to count integer lattice points close to a subspace of $\mathbb R^n$? 2018-02-02T13:07:47.803

8 Listing lattice points in a simplex 2011-03-08T04:34:23.353

8 Dense sphere packings which are not lattice packings 2011-04-07T10:18:48.653

8 How to find nearest lattice point to given point in R^n ? Is it NP ? 2011-04-16T08:02:37.033

8 Lattices in $SL(n,\mathbb R)$ 2012-07-03T23:39:44.197

8 Is the group of integer points of ${\rm SO}(n,1)$ maximal? 2013-04-12T13:56:46.893

8 Main problems on lattice-basis reduction algorithms (such as LLL)? 2013-09-04T19:25:29.260

8 Is this obfuscation scheme unbreakable? 2014-02-04T04:12:01.227

8 What's in the genus of the cubic lattice? 2016-02-03T16:01:30.517

7 `Topos' with alternate subobject lattice? 2010-04-18T23:11:39.517

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

7 What groups have a second maximal subgroup below exactly four maximal subgroups? 2011-05-02T04:29:58.487

7 Maximal number of edges and triangular cells for n points in a triangular lattice 2011-08-25T01:39:08.180

7 Octonionic reflection groups 2012-03-15T11:47:11.613

7 Restricting representations to lattices 2012-09-10T01:41:09.613

7 genus and spinor genus over a number field 2012-12-30T09:20:22.010

7 Minkowski's convex body theorem for ellipsoids 2013-05-28T23:10:39.717

7 A characterization of the poset of filters on a set 2013-08-16T19:43:01.797

7 How "accidental" are equalities between parts of Ehrhart quasi-polynomials? When do they persist to Euler-Maclaurin? 2013-11-28T05:52:16.947

7 Easiest way to distinguish $E_8 \oplus E_8$ from $E_{16}$ 2014-06-24T09:45:51.627

7 Examples of fundamental domains 2014-07-07T10:47:11.773

7 Upper bound on the number of ismorphism classes of bilinear forms on $\mathbb{Z}^n$ 2014-08-20T15:00:18.517

7 Given a positive-definite integral unimodular Gram matrix, how to find a basis of the associated lattice (over $\mathbf Q$)? 2014-09-08T09:25:46.150

7 Translative packing constant strictly larger than lattice packing constant 2014-10-03T01:04:49.880

7 Question on some coverings of the euclidean space 2015-09-22T21:16:18.857

7 Lattice points near a curve 2016-01-26T00:10:51.203

7 Which unimodular matrices are integer combinations of permutations? 2016-10-03T10:16:08.977

7 Modularity of certain theta series associated to hyperbolic lattice 2016-11-14T03:18:39.610

7 Checking a generating set of $\mathbb{Z}^k$ 2017-10-08T23:57:34.183

7 Subgroups of $\mathbb{Z}^{n}$ with rotational symmetries 2018-01-20T16:01:13.363

7 Shortest vectors in a root lattice 2018-02-24T20:57:52.757

7 Are there Type III codes with small but nonzero "index"? 2018-03-23T01:46:18.793