The geometry seminar is held every Tuesday, 3:304:30pm in the main seminar room at the Bayes Centre (5th floor), but check the schedule for exceptions. The seminar is organised by all faculty working in geometry, and currently coordinated by Sjoerd Beentjes. See the Seminars page for instructions on how to subscribe to the geometrytopology mailing list or, even better, the joint maxiedge mailing list.
The seminar is named after William Edge (19041997), who is known for example for his work on finite geometry, and worked at the University of Edinburgh for over 40 years (19321975). Related seminars are Topology, MAXIMALS, EMPG, GLEN, COW.
Current Semester
Upcoming talks:

Tudor Padurariu (MIT) TBA
15th January 2019, 3:30pm to 4:30pm 
EDGE: Roberto Svaldi (Cambridge) TBA
5th March 2019, 3:30pm to 4:30pm Bayes Centre Seminar Room 5.10  Show/hide abstract
Previous talks:

EDGE: Yongnam Lee (KAIST) On function fields and deformations of hypersurfaces
4th December 2018, 3:30pm to 4:30pm Bayes Centre Seminar Room 5.10  Show/hide abstract 
EDGE: Francesco Sala (Kavli IPMU) 2D Cohomological Hall algebra of a curve
27th November 2018, 3:30pm to 4:30pm Bayes Centre, 5th floor  Show/hide abstract 
EDGE: Jeff Hicks (UC Berkeley) Dimers and Tropical Lagrangians
20th November 2018, 3:30pm to 4:30pm Bayes Centre Room 5.02  Show/hide abstract 
Special EDGE: Ivan Smith (Cambridge) Lagrangian pinwheels
15th November 2018, 3:30pm to 4:30pm JCMB Seminar Room 5323  Show/hide abstract 
EDGE: Mauricio Corrêa (Oxford) Moduli spaces of reflexive sheaves and classification of distributions on P^3
13th November 2018, 3:30pm to 4:30pm Bayes Centre Seminar Room 5.10  Show/hide abstract 
EDGE: Aaron Bertram (Utah) Stability Conditions on Projective Space
13th November 2018, 2:00pm to 3:00pm Bayes Centre Seminar Room 5.10  Show/hide abstract 
Special EDGE: Alexander Kuznetsov (Moscow) Residual categories
12th November 2018, 3:00pm to 4:00pm JCMB Seminar Room 5323  Show/hide abstract 
ICMS workshop: Constructions and obstructions in birational geometry (NO EDGE)
6th November 2018, 3:30pm to 4:30pm Bayes Centre, 5th floor 
EDGE: Gregory G. Smith (Queen's University) Sums of squares on real projective varieties
30th October 2018, 3:30pm to 4:30pm Bayes Centre Seminar Room 5.10  Show/hide abstract 
EDGE Special Seminar: Victor Przyjalkowski (HSE Moscow) Weighted complete intersections
25th October 2018, 3:00pm to 4:00pm JCMB, Seminar Room 5323  Show/hide abstract 
EDGE: Angela Ortega (HU Berlin) Generic injectivity of the Prym map for double ramified coverings
23rd October 2018, 3:00pm to 4:00pm JCMB Seminar Room 5323  Show/hide abstract 
EDGE Special Seminar: Ziquan Zhuang (Princeton) Superrigidity and Kstability
18th October 2018, 2:10pm to 3:10pm JCMB Seminar Room 5323  Show/hide abstract 
EDGE: Hiro Lee Tanaka (Harvard) Morse theory on a point, and associative algebras
16th October 2018, 3:30pm to 4:30pm Bayes Centre Seminar Room 5.10  Show/hide abstract 
EDGE: Laura Pertusi (Milano) Geometry of fourfolds with an admissible K3 subcategory
16th October 2018, 2:00pm to 3:00pm Bayes Centre Seminar Room 5.10  Show/hide abstract 
MAXIMALS Doubleheader
9th October 2018, 2:00pm to 4:30pm 
EDGE: Helge Ruddat (Mainz) Smoothing toroidal crossing varieties
2nd October 2018, 3:30pm to 4:30pm Bayes Centre Seminar Room 5.10  Show/hide abstract 
EDGE: Clark Barwick (Edinburgh) Inverse Galois Problems
25th September 2018, 3:30pm to 4:30pm JCMB, Seminar Room 5323  Show/hide abstract 
EDGE: Nick Sheridan (Edinburgh) Cubic fourfolds, K3 surfaces and mirror symmetry
18th September 2018, 3:05pm to 3:55pm JCMB, Seminar Room 5323  Show/hide abstract 
EDGE V. Balaji (Chennai Mathematical Institute) On semisimplicity of tensor products in positive characteristics
5th July 2018, 2:05pm to 2:55pm JCMB, Seminar Room 5323  Show/hide abstract 
EDGE Filippo Viviani (Rome)  On the first steps of the minimal model program for the moduli space of stable pointed curves
28th June 2018, 2:05pm to 2:55pm JCMB, Seminar room 5323  Show/hide abstract 
EDGE Miles Reid (Warwick)  The TateOort Group and Godeaux Surfaces in Mixed Characteristic
15th June 2018, 2:05pm to 2:55pm JCMB, Seminar room 5323  Show/hide abstract 
GLEN seminar: Maxence Mayrand (Oxford)
15th June 2018, 11:00am to 12:00pm JCMB 5323  Show/hide abstract 
GLEN seminar: Hendrik Suess (Manchester)
15th June 2018, 9:45am to 10:45am JCMB 5323  Show/hide abstract 
GLEN seminar: Andrew Dancer (Oxford)
14th June 2018, 3:30pm to 4:30pm JCMB 5323  Show/hide abstract 
GLEN seminar: Leonardo Mihalcea (Virginia Tech)
14th June 2018, 2:00pm to 3:00pm JCMB 5323  Show/hide abstract 
EDGE Nicolò Sibilla (Kent)  Log schemes, root stacks and parabolic bundles
7th June 2018, 2:05pm to 2:55pm JCMB, Seminar room 5323  Show/hide abstract 
EDGE: Daniel HalpernLeistner (Cornell)  Wall crossing in moduli problems large and small
31st May 2018, 3:05pm to 3:55pm JCMB, Seminar room 5323  Show/hide abstract 
EDGE: Xiaolei Zhao (Northeastern/UCSB)  Twisted cubics on cubic fourfolds and stability conditions
31st May 2018, 2:05pm to 2:55pm JCMB, Seminar room 5323  Show/hide abstract 
EDGE: Anna Barbieri (Sheffield)  A RiemannHilbert problem for uncoupled BPS structures
24th May 2018, 2:05pm to 2:55pm JCMB, Seminar room 5323  Show/hide abstract 
EDGE: Fabio Bernasconi (Imperial College London)  Pathologies for Fano varieties and singularities in positive characteristic
17th May 2018, 3:05pm to 3:55pm JCMB, Seminar room, 5323  Show/hide abstract 
EDGE: Davide Cesare Veniani (Mainz)  Recent advances about lines on quartic surfaces
17th May 2018, 2:05pm to 2:55pm JCMB, Seminar room, 5323  Show/hide abstract 
EDGE: Francesca Carocci (Imperial College London)  Reduced vs Cuspidal GW invariants for the quintic 3fold
10th May 2018, 2:05pm to 2:55pm JCMB, Seminar room 5323  Show/hide abstract 
EDGE: Alexander Kasprzyk (Nottingham)  Bounding the anticanonical degree of toric Gorenstein Fano varieties
26th April 2018, 3:05pm to 3:55pm JCMB, room 4325B  Show/hide abstract 
EDGE: Thomas Baier (IST Lisbon)  Mabuchi Geodesic Rays on Hamiltonian KSpaces and Mixed Polarizations
26th April 2018, 2:05pm to 2:55pm JCMB, room 4325B  Show/hide abstract 
EDGE: Chris Elliott (IHES)  The Multiplicative Hitchin System in Supersymmetric Gauge Theory
19th April 2018, 2:05pm to 2:55pm JCMB, Seminar room 5323  Show/hide abstract 
EDGE: Swarnava Mukhopadhyay (Bonn)  Hyperplane arrangements and invariants of tensor products.
12th April 2018, 2:05pm to 2:55pm JCMB, Seminar room 5323  Show/hide abstract 
EDGE: Giulio Codogni (Ecole Polytechnique Fédérale de Lausanne)  Positivity of the ChowMumford line bundle for families of Kstable klt Fano varieties
5th April 2018, 2:05pm to 2:55pm JCMB, seminar room 5323  Show/hide abstract 
EDGE: Nils Carqueville (Vienna)  Topological quantum field theories: state sums and defects
29th March 2018, 2:05pm to 2:55pm JCMB, Seminar room, 5323  Show/hide abstract 
EDGE: Andrea Fanelli (Dusseldorf)  Del Pezzo fibrations in positive characteristic
15th March 2018, 2:05pm to 2:55pm JCMB Seminar Room 5323  Show/hide abstract 
EDGE: Naoki Koseki (Tokyo)  Perverse coherent sheaves on blowups at codimension two loci
9th March 2018, 2:05pm to 2:55pm JCMB, Room 4312  Show/hide abstract 
EDGE: Takero Fukuoka (Tokyo/Warwick)  Relative linear extensions of sextic del Pezzo fibrations
1st March 2018, 2:05pm to 2:55pm JCMB, Seminar Room 5325  Show/hide abstract 
EDGE: Sjoerd Beentjes (University of Edinburgh)  The crepant resolution conjecture for DonaldsonThomas invariants
15th February 2018, 2:05pm to 2:55pm Seminar Room 5323 JCMB  Show/hide abstract 
EDGE: Julio Andrade (University of Exeter)  Two Problems Involving the Divisor Functions
8th February 2018, 2:05pm to 2:55pm EDGE: JCMB, Seminar room, 5323  Show/hide abstract 
EDGE: Andrea Ricolfi (Bonn)  The DT/PT correspondence for smooth curves
30th January 2018, 2:05pm to 2:55pm JCMB, Seminar room 5323  Show/hide abstract 
Joint EDGEMAXIMALS: Peter Samuelson (University of Edinburgh)  The Hall algebra of the Fukaya category of a surface
16th January 2018, 3:05pm to 3:55pm JCMB, Seminar Room 5323  Show/hide abstract 
EDGE: Tran Bach (Edinburgh)  On knormality and Regularity of Normal Toric Varieties
7th December 2017, 2:05pm to 2:55pm Seminar room JCMB 5323  Show/hide abstract 
EDGE: Alex Lemmens (University of Leuven)  Syzygies of toric varieties
30th November 2017, 2:05pm to 2:55pm Seminar room JCMB 5323  Show/hide abstract 
EDGE: Stefan Schreieder (University of Munich)  The rationality problem for quadric bundles
23rd November 2017, 2:05pm to 2:55pm Seminar room JCMB 5323  Show/hide abstract 
EDGE: Soheyla Feyzbakhsh (University of Edinburgh)  Applications of Bridgeland stability conditions to classical algebraic geometry
16th November 2017, 2:05pm to 2:55pm Seminar room JMCB 5323  Show/hide abstract 
EDGE: Navid Nabijou (Imperial College London)  Relative Quasimaps and a Lefschetztype Formula
9th November 2017, 2:05pm to 2:55pm JCMB Seminar room 5323  Show/hide abstract 
EDGE: Andrea Petracci (Nottingham)  Deformations of toric singularities and Mirror Symmetry
2nd November 2017, 2:05pm to 2:55pm JCMB Seminar room 5323  Show/hide abstract 
EDGE: Ben Davison (Glasgow)  The integrality conjecture for coherent sheaves on a CalabiYau 3fold.
26th October 2017, 2:05pm to 2:55pm Seminar room JCMB 5323  Show/hide abstract 
EDGE: Nicola Pagani (Liverpool)  The indeterminacy of the AbelJacobi maps
19th October 2017, 2:05pm to 2:55pm Seminar room JCMB 5323  Show/hide abstract 
EDGE: Adam Boocher (University of Utah)  Inequalities on Betti Numbers
12th October 2017, 2:05pm to 2:55pm Seminar room JCMB 5323  Show/hide abstract 
EDGE: Mara Ungureanu (HU Berlin)  From billiards in polygons to de Jonquières divisors
5th October 2017, 2:05pm to 2:55pm Seminar room JCMB 5323  Show/hide abstract 
EDGE: Gwyn Bellamy (Glasgow)  Counting symplectic resolutions of quotient singularities
28th September 2017, 2:05pm to 2:55pm Seminar room JCMB 5323  Show/hide abstract 
EDGE: Lorenzo Foscolo (HeriotWatt)  Complete noncompact G2 manifolds from asymptotically conical CalabiYau 3folds
21st September 2017, 2:05pm to 2:55pm Seminar room JCMB 5323  Show/hide abstract 
EDGE: Elizabeth Gasparim (Universidad Católica del Norte)  A LandauGinzburg model without projective mirrors
8th August 2017, 2:05pm to 2:55pm JCMB 5323  Show/hide abstract 
EDGE: Benjamin Schmidt (UT Austin)  The Genus of Space Curves
29th June 2017, 5:30pm to 6:30pm JCMB 5326  Show/hide abstract 
EDGE: Francis Bischoff (Toronto University)  Morita equivalence and the generalized Kahler potential
15th June 2017, 2:10pm to 3:00pm Seminar room JCMB 5323  Show/hide abstract 
EDGE: DeQi Zhang (NUSingapore)  Polarized endomorphisms of projective varieties
30th May 2017, 10:10am to 11:00am JCMB 5323  Show/hide abstract 
EDGE: Jason Lo (CSU)  Behaviour of slope stable sheaves under a FourierMukai transform
25th May 2017, 2:10pm to 3:00pm JCMB Seminar room 5323  Show/hide abstract 
EDGE: Xiaolei Zhao (Northeastern)  Canonical points on K3 surfaces and hyperKähler varieties.
4th May 2017, 2:10pm to 3:00pm JCMB 5323  Show/hide abstract 
EDGE: Richard Szabo (HeriotWatt)  Orientifolds and Real bundle gerbes
20th April 2017, 2:10pm to 3:00pm JCMB Seminar room 5323  Show/hide abstract 
EDGE: Emilio Franco (Porto)  Moduli spaces of Lambdamodules on abelian varieties
6th April 2017, 2:40pm to 3:30pm Seminar room JCMB 5323  Show/hide abstract 
EDGE/EMPG: Dennis The (University of Tromsø)  Exceptionally simple PDE
5th April 2017, 12:10pm to 1:00pm JCMB 5323  Show/hide abstract 
EDGE: Alexey Bondal (Steklov/Higher School of Economics)  Flobers: Flops and Schobers
4th April 2017, 12:10pm to 1:00pm JCMB 4312  Show/hide abstract 
EDGE: Philip Boalch (Paris Sud)  Nonperturbative hyperkahler manifolds and H3 surfaces
30th March 2017, 2:40pm to 3:30pm JCMB Seminar room 5323  Show/hide abstract 
EDGE: Mihai Fulger (Princeton)  Seshadri constants for curves
23rd March 2017, 2:10pm to 3:00pm JCMB Seminar room 5323  Show/hide abstract 
EDGE: Jenia Tevelev  The CraigheroGattazzo surface is simplyconnected
16th March 2017, 4:10pm to 5:00pm JCMB 5323  Show/hide abstract 
EDGE: Giovanni Mongardi (Milan)  The last involutions
16th March 2017, 2:10pm to 3:00pm JCMB Seminar Room 5323  Show/hide abstract 
EDGE: Marcos Jardim  Moduli spaces of instanton sheaves on projective space
9th March 2017, 2:10pm to 3:00pm JCMB Seminar room 5323  Show/hide abstract 
EDGE: Yanki Lekili (KCL)  Fukaya categories of plumbings and multiplicative preprojective algebras
2nd March 2017, 2:10pm to 3:00pm JCMB Seminar room (5th floor)  Show/hide abstract 
EDGE: Boris Kruglikov(Tromsø)  The gap phenomenon and submaximally symmetric structures
16th February 2017, 2:10pm to 3:00pm JCMB 5215  Show/hide abstract 
EDGE: Ruadhai Dervan (Cambridge)  Kstability for Kähler manifolds
9th February 2017, 2:10pm to 3:00pm JCMB Seminar room 5323  Show/hide abstract 
EDGE: George Dimitrov (ICTP)  Norms of noncommutative projective spaces via Bridgeland stability conditions
2nd February 2017, 2:10pm to 3:00pm JCMB Seminar Room 5323  Show/hide abstract 
EDGE: Alex Perry (Columbia University) Derived categories of GushelMukai varieties
26th January 2017, 2:10pm to 3:00pm JCMB 1501  Show/hide abstract 
EDGE: Caucher Birkar(Cambridge) Birational geometry of Fano varieties
19th January 2017, 2:10pm to 3:00pm JCMB 1501 
EDGE: Jinhyung Park(KIAS)  NewtonOkounkov bodies and asymptotic invariants of divisors
8th December 2016, 2:10pm to 3:00pm JCMB 1501  Show/hide abstract 
EDGE: Theo Raedschelders (Vrije Universiteit Brussel)  Derived categories of noncommutative quadrics and Hilbert schemes of points
1st December 2016, 2:10pm to 3:00pm JCMB1501  Show/hide abstract 
EDGE: Maxym Fedorchuk (Boston)  Invariant theory of Artinian Gorenstein algebras
24th November 2016, 2:10pm to 3:00pm JCMB1501  Show/hide abstract 
EDGE: Michael Wemyss (Glasgow)  On the Classification of 3fold Flops
17th November 2016, 2:10pm to 3:10pm JCMB 1501  Show/hide abstract 
EDGE: Piotr Pragacz (Polisch Academy of Sciences)  Duality on Grassmann bundles and applications
10th November 2016, 2:10pm to 3:00pm JCMB 1501  Show/hide abstract 
EDGE: Dimitra Kosta (Edinburgh)  Maximum Likelihood Estimation for models corresponding to toric del Pezzo surfaces
3rd November 2016, 2:10pm to 3:10pm JCMB 1501  Show/hide abstract 
EDGE: SeungJo Jung (KIAS, Seoul)  Gconstellations and quotient singularities
27th October 2016, 2:10pm to 3:00pm JCMB 1501  Show/hide abstract 
EDGE: Diletta Martinelli (Edinburgh)  On the number of minimal models of a smooth threefold of general type
20th October 2016, 2:10pm to 3:10pm JCMB 1501  Show/hide abstract 
EDGE: Jesus MartinezGarcia (Max Planck)  Moduli space of cubic surfaces and their anticanonical divisors
13th October 2016, 2:10pm to 3:00pm JCMB 1501  Show/hide abstract 
EDGE: Julian Holstein (Lancaster)  The derived period map
6th October 2016, 2:10pm to 3:00pm JCMB 1501  Show/hide abstract 
EDGE: Roberto Fringuelli (Edinburgh)  The Picard group of the universal moduli space of vector bundles on stable curves.
29th September 2016, 2:10pm to 3:00pm JCMB 1501  Show/hide abstract 
EDGE: Igor Pak (UCLA)  What is a formula?
19th September 2016, 2:10pm to 3:10pm JCMB 6201  Show/hide abstract 
EDGE: Benjamin Bakker (HumboldtUniversitaet Berlin)  The birational geometry of complex ball quotients
21st June 2016, 1:45pm to 2:45pm JCMB 5327  Show/hide abstract 
EDGE: Asher Auel (Yale)  BrillNoether theory for cubic fourfolds
2nd June 2016, 2:00pm to 3:00pm JCMB 4325A  Show/hide abstract 
EDGE: Dario Beraldo (Oxford)  On the notion of temperedness in geometric Langlands
5th May 2016, 2:00pm to 4:00pm JCMB 6206  Show/hide abstract 
EDGE: Alexey Bondal (Steklov/IPMU/Higher School of Economics)  Noncommutative moduli of genus 0 npunctured curves
21st April 2016, 2:00pm to 3:00pm JCMB 4325B  Show/hide abstract 
EDGE: Emile Bouaziz (Edinburgh)  The Twisted Chiral de Rham Complex
31st March 2016, 2:10pm to 3:00pm JCMB 5327  Show/hide abstract 
EDGE: Kai Behrend (UBC)  The spectrum of the inertia operator on the motivic Hall algebra
24th March 2016, 2:10pm to 3:00pm JCMB 5327  Show/hide abstract 
EDGE: Bruce Bartlett (Oxford)  Threedimensional bordism representations
17th March 2016, 1:10pm to 2:00pm JCMB 5327  Show/hide abstract 
EDGE: Roland Abuaf (IHES)  Compact hyperkähler categories
10th March 2016, 2:10pm to 3:00pm JCMB 5327  Show/hide abstract 
EDGE: Igor Krylov  Classification and birational rigidity of del Pezzo fibrations with an action of the Klein simple group
3rd March 2016, 2:10pm to 3:00pm JCMB 5327  Show/hide abstract 
EDGE: Kaie Kubjas (Aalto)  Semialgebraic geometry of nonnegative and psd rank
25th February 2016, 2:10pm to 3:00pm JCMB 5327  Show/hide abstract 
EDGE: Mohammad Akhtar (IHES)  Mutations and the Classification of Fano Varieties
18th February 2016, 2:10pm to 3:00pm JCMB 5327  Show/hide abstract 
EDGE: Yuki Hirano (Tokyo Metropolitan University/Edinburgh)  Derived Knoerrer periodicity and Orlov's theorem for gauged LandauGinzburgh models
11th February 2016, 2:10pm to 3:00pm JCMB 5327  Show/hide abstract 
EDGE: Matilde Marcolli (Caltech)  Motives in Quantum Field Theory
1st February 2016, 1:00pm to 2:00pm JCMB 5327  Show/hide abstract 
EDGE: Roberto Svaldi (Cambridge)  A geometric characterization of toric varieties.
28th January 2016, 2:10pm to 3:00pm JCMB 5327  Show/hide abstract 
Big data/EDGE seminar: Marta Casanellas Rius (Barcelona)  The link between pure mathematics and phylogenetics
22nd January 2016, 2:10pm to 3:00pm JCMB 4325A  Show/hide abstract 
EDGE: Lotte Hollands (HeriottWatt)  Spectral networks and the T3 theory
3rd December 2015, 2:10pm to 3:00pm JCMB 6311  Show/hide abstract 
EDGE seminar: James Pascaleff (UIUC)  Equivariant structures on Lagrangian submanifolds
19th November 2015, 3:10pm to 4:00pm JCMB 6311  Show/hide abstract 
EDGE seminar: Wouter Castryck (Gent)  Geometric invariants encoded in the Newton polygon
19th November 2015, 2:10pm to 3:00pm JCMB 6311  Show/hide abstract 
EDGE seminar: Renzo Cavalieri (CSU)  Open invariants and Crepant Transformations
12th November 2015, 2:10pm to 3:00pm JCMB 6311  Show/hide abstract 
EDGE seminar: Oscar GarcíaPrada (ICMAT)  Higgs bundles and representations of surface groups
12th November 2015, 1:10pm to 2:00pm JCMB 6311  Show/hide abstract 
EDGE seminar: Nikita Kalinin (Geneva)  Tropical geometry in sandpiles, singularity theory and Legendrian geometry
5th November 2015, 3:10pm to 4:00pm JCMB 6311  Show/hide abstract 
EDGE seminar: Agnieszka Bodzenta (Edinburgh)  Perverse schobers and flops
5th November 2015, 2:10pm to 3:00pm JCMB 6311  Show/hide abstract 
Hodge seminar: Sarah Zerbes (UCL)  Euler systems and the conjecture of Birch and SwinnertonDyer
2nd November 2015, 1:10pm to 2:00pm JCMB 5327  Show/hide abstract 
EDGE: Alexander Pukhlikov (Liverpool)  Birationally rigid FanoMori fibre spaces
29th October 2015, 3:10pm to 4:00pm JCMB 6206  Show/hide abstract 
EDGE: Jørgen Rennemo (Oxford)  Homological projective duality for Sym^2 P^n
22nd October 2015, 2:10pm to 3:00pm JCMB 6311  Show/hide abstract 
EDGE: Joseph Karmazyn (Bath)  Noncommutative Knörrer periodicity
15th October 2015, 2:10pm to 3:00pm JCMB 6311  Show/hide abstract 
EDGE: Dmitri Orlov (Steklov)  Derived noncommutative schemes, their geometric realizations, and quiver algebras
8th October 2015, 3:10pm to 4:00pm JCMB 6311 
EDGE: Victor Przyjalkowski (Steklov)  On Hodge numbers for LandauGinzburg models
8th October 2015, 2:10pm to 3:00pm JCMB 6311  Show/hide abstract 
EDGE: Igor Krylov (Edinburgh)  Rationally connected non Fano type varieties
1st October 2015, 2:10pm to 3:00pm JCMB 6311  Show/hide abstract 
EDGE: Matthew Woolf (Edinburgh)  Rational curves on general hypersurfaces in positive characteristic
24th September 2015, 2:10pm to 3:00pm JCMB 6311  Show/hide abstract