Talks in conferences/workshops/seminars
Note added 20200719: The original list only included invited talks, and left out various contributed talks. At some point I intend to go through and fill in some of the missing entries, and perhaps reorganize this page, which has got out of hand over the last five years.
2021
 Completely almost periodic elements of group von Neumann algebras
BMC+BAMC 2021, University of Glasgow (20210406)
[ Beamer version (original)  Print version, with comments ]
2020
 Fourier algebras and dual convolution
Pure Mathematics Colloquium, University of Sheffield (20201202)
[ Handwritten slides (lower res than the file used in the talk; jpg to pdf; 8MB) ]
 An introduction to nonamenability of B(E)
UK Virtual Operator Algebras Seminar (20201119)
[ FoilTeX version (original) ]
 Amenability constants of centres of group algebras
Inverse Problems and Analysis Seminar, University of Delaware (20200303)
[ Beamer version (original)  Print version, with comments ]
 Constructing alternating cocycles on Fourier algebras
Analysis Seminar, Newcastle University (20200218)
[Whiteboard talk]
2019
 Alternating cocycles on Fourier algebras of Lie groups
Workshop on Harmonic Analysis and Operator Theory, Istanbul (20190828)
[ Beamer version (original) ]
 Approximate homomorphisms: some old and new results
Banach Algebras 2019, Winnipeg (20190717)
[ Beamer version (original) ]
 Constructing 2cocycles on Fourier algebras
Analysis Seminar, University of Glasgow (20190131)
[Blackboard talk]
2018
 Derivations from the disc algebra to various modules
Inverse Problems and Analysis Seminar, University of Delaware (20180919)
[ Beamer version (original)
]

Twisted tensor products, and cocycles on Fourier algebras
Abstract Harmonic Analysis 2018, National Sun YatSen University, Taiwan (20180626)
[ Beamer version (original)  Print version, with comments ]

A look at Fourier algebras of some Lie groups
Analysis Seminar, King's College London (20180621)
[Blackboard talk]

Derivations and alternating cocycles on Fourier algebras
Oberseminar, University of Münster (20180417)
[Blackboard talk (natürlich)]
2017
 Directly finite algebras arising from group representations
Inverse Problems and Analysis Seminar, University of Delaware (20171003)
[ FoilTeX version (original) ]

Completely almost periodic elements of Hopf von Neumann algebras
Operator Algebras Seminar, Seoul National University (20170916)
[Blackboard talk]
 Some results on direct finiteness of group algebras
CAHAS 2017, University of Manitoba (20170523)
[ Beamer version (original)  Print version, with comments ] N.B. Minor corrections made after the talk. Last updated 20170720.
2016
 CAP and ITAP for group von Neumann algebras
Groups and Operators, Gothenburg (20160816)
[Blackboard talk]
 AP, WAP, CAP and another AP
Analysis Seminar, University of Glasgow (20160517)
[Blackboard talk]
 Some operator algebras that are locally similar to selfadjoint ones
Analysis seminar, Newcastle University (20160426)
[Blackboard talk]
 Derivations on Fourier algebras of connected groups
Young Functional Analysts' Workshop, Queen's University Belfast (20160408)
Didn't use all the slides. Copy available on request.

Orthogonality relations and the study of derivations on Fourier algebras
Analysis and PDE Seminar, University of Sussex (20160118)
2015

Constructing amenable operator algebras
Functional Analysis Seminar, University of Oxford (20151027)
[ FoilTeX version ] N.B. Typo fixed after the talk. Didn't use all the slides, gave extra details on the board.
 Derivations on semigroup algebras and Fourier algebras
Banach Algebras and Applications 2015
Fields Institute for Research in Mathematical Sciences, Toronto (20150806)
[ Beamer version (original)  Print version, with comments ] N.B. Minor corrections made after the talk. Last updated 20150901.
 The ZLamenability constant of a finite group
Pure Maths Colloquium, Queen's University Belfast (20150501)
Print version with comments.
2014

Unitarizable representations and amenable operator algebras
QOP Network Meeting, Lancaster (20140925)
Print version with comments.

Orthogonality relations and the study of derivations on Fourier algebras
Abstract Harmonic Analysis Days, Castellon (20140724)
Print version with comments.

Unitarizable group representations and amenable operator algebras
Thematic program on Abstract Harmonic Analysis, Banach and Operator Algebras
Fields Institute for Research in Mathematical Sciences, Toronto (20140528)
Print version with comments.
(Apologies are due to Anton Chekhov, as pointed out to me after the talk by Volker Runde.)

Derivations on Fourier algebras of connected Lie groups
Analysis Seminar, University of Glasgow (20140506)
Print version with comments.

Weak amenability of Fourier algebras: old and new results
Thematic program on Abstract Harmonic Analysis, Banach and Operator Algebras
Fields Institute for Research in Mathematical Sciences, Toronto (20140414)
Print version with comments.

Derivations on Fourier algebras of some connected Lie groups
Algebra and Analysis seminar, University of Nottingham (20140321)
Print version with comments.

Amenable operator algebras
Scottish Operator Algebras Seminar, University of Glasgow, (20140314)
(Survey talk, given on blackboard talk, contributed as lastminute replacement for an absent speaker)

The ZLamenability constant of a finite group
Analysis seminar, Newcastle University (20140311)
FoilTeX version with comments.
(expanded version of the CMS talk listed below)
2013
 Derivations from the disc algebra to natural modules
Banach Algebras and Applications, Chalmers University, Gothenburg, Sweden (04/08/13)
[ Beamer version (original version)  FoilTeX version, with comments (for printing) ]
 Commutative amenable subalgebras of B(H): a partial survey.
Geometry and Analysis seminar, Queen Mary University of London (28/05/13)
[ Beamer version (original version)  FoilTeX version, with comments (for printing) ]

Direct finiteness of CV_{p}(G) and PF_{p}(G)
International Conference on Abstract Harmonic Analysis, Granada (24/05/13)
[ Beamer version (original)  FoilTeX version, with comments (for printing) ]
(Warning: there is a typo/omission in the talk (page 10 of both versions), the proof given requires 1<p<2)
 Weak amenability of Fourier algebras of connected Lie groups.
Analysis seminar, University of Newcastle upon Tyne (16/05/13)
Whiteboard talk.
2012
2011
2010
 "Leftinvertible implies invertible": examples and questions from abstract harmonic analysis
Banach algebra and operator space techniques in topological group theory, University of Leeds (27/05/10)
 Group representations where every convolution operator has empty residual spectrum
Seminar on Functional Analysis and Applications, Instituto Superior Técnico, Lisbon (21/05/10)
 TF subsets of Z_{+} and weakly compact derivations
Analysis seminar, University of Waterloo (26/03/10)
 Group representations and associated algebras: from convolution operators to cohomology
Department colloquium, University of Saskatchewan (26/02/10)
2009 and before
Selection of contributed talks (on own research)
 Left invertible elements are invertible in complex group algebras
Algebra, Combinatorics, Measure Seminar, Lancaster University (20170306)
 A Luzin gap in P(N)/FIN
Algebra, Combinatorics, Measure Seminar, Lancaster University (20161017)
 Derivations on Fourier algebras of various Lie groups
Pure Maths Seminar, Lancaster University (20141210)

The ZLamenability constant of a finite group
CMS Winter Meeting, Ottawa (20131207)
[ Beamer version (original version)  FoilTeX version, with comments (for printing) ]

Explicit derivations on Fourier algebras of some connected Lie groups
Canadian Symposium on Abstract Harmonic Analysis, Lakehead University (04/05/13)
 Approximately multiplicative functionals on weighted semilattice algebras
Saskatchewan Analysis Day, Saskatoon (17/03/12)
(Slides corrected 30/01/13)
 Commutative amenable subalgebras of finite von Neumann algebras
Canadian Symposium on Operator Theory, Victoria (25/05/11)
Beamer version (as used in the talk) and FoilTeX version (for printing)
 Commutative amenable operator algebras
Operator theory and its applications, Gothenburg (26/04/11)
FoilTeX slides: landscape format (as used in the talk) and portrait format with comments.
 Directly finite group algebras: some examples and questions
Canadian Symposium on Abstract Harmonic Analyis, Saskatoon (05/08/10)
Beamer version (as used in the talk) and FoilTeX version (for printing).
 Convolution operators with empty residual spectrum
Topological and Banach algebras splinter session, FAV10, Valencia (06/06/10)
 Convolution operators, residual spectrum, and directly finite Banach algebras
Young Functional Analysts' Meeting, Newcastle University (11/01/10)
 Group representations with empty residual spectrum
CMS Winter Meeting, Hilton Hotel, Windsor (05/12/09)
 Translationfinite sets and weakly compact derivations
CAHAS 2009 (`Laufest'), University of Alberta (15/05/09)
 Éléments inversibles, et des idempotents, dans les algèbres des groupes
Séminaire d'analyse, Université Laval (21/11/08)
 Injectivity and surjectivity of convolution operators on l^{∞}(G)
Séminaire d'analyse, Université Laval (12/09/08)
 When are injective convolution operators surjective?
Canadian Symposium on Abstract Harmonic Analysis, Carleton University (25/05/08)
 Homology and cohomology of
2nd PNRMS Conference, Brandon University (08/05/08)
 When are injective convolution operators surjective?
Functional analysis seminar, University of Manitoba (23/11/07)
 Approximate amenability of PF_{p}(G)
Functional analysis seminar, University of Manitoba (12/10/07)
 Homology and cohomology for (some typos corrected May '08)
Banach Algebras 2007, Université Laval (05/07/07)
 Biflatness for Clifford semigroup algebras
CMSMITACS meeting, Winnipeg Convention Centre (02/05/07)
 Weakened notions of amenability for semilattice algebras
(copies of slides available on request)
British Mathematical Colloquium, Swansea University (17/04/07)
 Cohomology problems for the analytic Wiener algebra
Belfast Functional Analysis Day (25/11/06)
 convolution algebras, and bounded cohomology, of semilattices
British Mathematical Colloquium, Newcastle University (??/04/06)
 From the product rule to normed cohomology
Postgraduate forum, Newcastle University
 Cohomology of semilattice algebras
(copies of slides available on request)
Banach Algebras 2005, Bordeaux, (04/07/05)
 Cohomology of semigroup algebras
British Mathematical Colloquium, Liverpool (??/04/05)
 Simplicial cohomology of A_{α}. (slides in .pdf)
British Mathematical Colloquium, Queen's University Belfast (07/04/04)
See also the conferences I've attended.