Tag: algebraic-spaces

33 Is an algebraic space group always a scheme? 2009-12-14T22:33:18.367

23 Categorical construction of the category of schemes? 2010-05-30T21:21:36.570

22 Why is this not an algebraic space? 2009-12-15T21:06:01.560

16 Is every algebraic space the quotient of a scheme by a finite group? 2011-06-29T19:56:30.283

15 Are "fpqc algebraic spaces" algebraic spaces? 2011-10-09T00:22:37.900

13 Coarse moduli spaces of stacks for which every atlas is a scheme 2014-11-06T16:42:34.903

12 Hodge structures on algebraic spaces 2010-12-19T00:05:07.053

9 Can an algebraic space fail to have a unviersal map to a scheme? 2009-11-08T03:58:20.253

9 Nisnevich covers of algebraic spaces 2013-06-07T13:23:18.430

8 surjective morphism of schemes or epimorphism of sheaves? 2011-10-27T13:27:22.527

8 What is an excellent algebraic space? 2015-05-01T16:12:28.583

7 Is the category of affine fppf groups closed under normal quotients? 2011-06-06T16:14:02.037

7 Is an algebraic space over a DVR, whose special fibre and generic fibre are schemes, actually a scheme? 2013-07-04T13:21:07.377

7 Is every proper regular relative algebraic space curve over a Dedekind domain projective? 2015-05-24T04:11:09.440

6 Do quotients of representable sheaves represent quotients? 2009-11-12T05:59:24.143

6 (Relative) ampleness on algebraic spaces 2013-09-19T10:48:29.353

5 Algebraic spaces which are automatically schemes 2015-06-09T14:42:30.040

4 Points of a weakly locally separated algebraic space 2009-10-02T04:16:07.120

4 Weil restriction of abelian schemes along finite étale (resp. finite locally free) morphisms 2013-04-10T16:49:02.180

4 The support of a finite type module on an algebraic space 2013-06-13T05:49:21.157

4 A reference for "an algebraic space is a scheme iff its reduction is"? 2015-02-03T01:59:58.803

3 Quasi-separatedness for Algebraic Spaces 2010-02-25T09:45:18.330

3 Does an étale equivalence relation of schemes induce an equivalence relation on points? 2010-04-18T15:18:21.607

3 Semicontinuity and cohomological flatness for algebraic spaces 2010-07-31T15:08:57.197

3 Subgroups of a group algebraic space 2013-07-02T13:32:27.477

3 Ample Line Bundles on Algebraic Spaces 2013-09-30T19:49:55.410

3 Is surjectivity for morphisms of schemes local on the domain? 2015-03-27T15:30:00.220

3 Is this diagram of sheaves actually Cartesian as claimed? 2015-04-26T06:10:34.160

3 Is there a difference between the inertia stack and the universal automorphism group 2015-06-10T14:14:39.110

2 How far is it to extend the results of SGA III Exp. VIB from group schemes to group spaces? 2015-03-26T16:08:13.787

2 When does an algebraic space that is a torsor over a scheme have to be a scheme? 2015-03-29T21:39:48.743

1 Relative identity component for group algebraic spaces 2014-12-10T07:07:12.723

1 Does a line bundle on a normal Noetherian algebraic space come from a Weil divisor? 2015-01-30T02:49:28.150

1 Artin's criterion for étale, quasi-separated algebraic spaces 2015-06-30T10:01:33.463

1 representability of a certain extension of group algebraic spaces 2016-05-31T13:00:05.477

0 morphisms between algebraic spaces 2012-10-14T09:47:40.157

0 Prorepresentable functors repres. by alg. spaces? Covering spaces by alg. spaces. 2013-03-27T15:47:58.327

0 pushing out families of curves 2014-12-29T10:36:49.530

0 Existence of $B$-reduction of a $G$-torsor on a curve 2016-02-01T10:28:49.500

0 representing base changes of the unit section 2016-06-16T10:59:04.097