Reader, Adviser of Studies, Postgraduate Research Convenor

Room 434 Mathematics and Statistics Building

School of Mathematics and Statistics

University of Glasgow

Brendan [dot] Owens [at] glasgow [dot] ac [dot] uk

My research is in low-dimensional topology. I am interested in smooth 3-manifolds, 4-manifolds and knots, and in the use of gauge-theoretic invariants of manifolds, especially Floer homology groups.

You can also find my papers on the arXiv, on MathSciNet, and on zbMATH.

- (with F. Swenton) An algorithm to find ribbon disks for alternating knots, arXiv:2102.11778.
- Smooth, nonsymplectic embeddings of rational balls in the complex projective plane, Q. J. Math. 71 (2020), no. 3, 997--1007.
- Equivariant embeddings of rational homology balls, Q. J. Math. 69 (2018), no. 3, 1101--1121.
- (with S. Strle) Immersed disks, slicing numbers and concordance unknotting numbers, Comm. Anal. Geom. 24 (2016), no. 5, 1107--1138.
- (with M. Nagel) Unlinking information from 4-manifolds, Bull. London Math. Soc. 47 (2015), no. 6, 964--979.
- (with P. Lisca) Signatures, Heegaard Floer correction terms and quasi-alternating links, Proc. Amer. Math. Soc. 143 (2015), no. 2, 907--914.
- (with R. Bieri and
P. Kropholler)
On subsets of S
^{n}whose (n+1)-point subsets are contained in open hemispheres, New York J. Math. 20 (2014), 1021--1041. - (with A. Donald) Concordance groups of links, Algebr. Geom. Topol. 12 (2012), no. 4, 2069--2093.
- (with S. Strle) Dehn surgeries and negative-definite four-manifolds, Selecta Math. (N.S.) 18 (2012), no. 4, 839--854.
- (with S. Strle)
A characterisation of the Z
^{n}⊕ Z(δ) lattice and definite nonunimodular intersection forms, Amer. J. Math. 134 (2012), no. 4, 891--913. - On slicing invariants of knots, Trans. Amer. Math. Soc. 362 (2010), no. 6, 3095--3106.
- Unknotting information from Heegaard Floer homology, Adv. Math. 217 (2008), no. 5, 2353--2376.
- (with C. Manolescu) A concordance invariant from the Floer homology of double branched covers, Int. Math. Res. Not. IMRN 2007, no. 20, Art. ID rnm077, 21 pp.
- (with S. Strle) A characterisation of the n⟨1⟩⊕⟨3⟩ form and applications to rational homology spheres, Math. Res. Lett. 13 (2006), no. 2, 259--271.
- (with S. Strle) Rational homology spheres and the four-ball genus of knots, Adv. Math. 200 (2006), no. 1, 196--216.
- (with S. Strle) Definite manifolds bounded by rational homology three spheres, ``Geometry and Topology of Manifolds'', Fields Institute Communications, Vol. 47, AMS (2005), pages 243--252.
- Instantons on cylindrical manifolds and stable bundles, Geometry and Topology, Vol. 5 (2001) Paper no. 24, pages 761--797.

- Andrew Donald (2013), Embedding 3-manifolds in 4-space and link concordance via double branched covers.
- Duncan McCoy (2016), Alternating surgeries.
- Daniel Waite (2020), Three-strand pretzel knots, knot Floer homology and concordance invariants.

Vitalijs Brejevs (joint with Andy Wand), Tanushree Shah (joint with Ana Lecuona and Andy Wand), Weizhe Niu.

- Glasgow Geometry and Topology group.
- Glasgow Geometry and Topology seminar.
- Core Structures @ Glasgow.
- Scottish Topology Seminar. I am a joint organiser of the STS.
- London Mathematical Society. I am the local LMS representative for Glasgow.
- Glasgow Mathematical Journal. I am managing editor of the GMJ.
- Research School: Developments in Contact and Symplectic Topology (Glasgow, 20-24 June 2016).
- Low dimensional topology on Skye (SMO, Skye, 12-16 June 2017).
- Durham Symposium: Pseudoholomorphic Curves and Gauge Theory in Low-Dimensional Topology (Durham, 19-23 August 2019).
- Joint British Mathematics Colloquium/British Applied Mathematics Colloquium 2021 (Glasgow, 6-9 April 2021). I am on the management committee.

- A maple program for computing the d-invariants of a positive semi-definite symmetric matrix. (Written jointly with S. Strle.)
- Mathematica programs to compute the Goeritz matrices of a link, and also to compute signature and nullity of a symmetric matrix, or of a link.
- A maple program for computing the Levine-Tristram signature function of a torus knot (based on Litherland's paper).