| Date | Speaker | Institution | Title |
| 11 February 2011 | Imre Leader |
University of Cambridge |
Lion and Man |
| 18 February 2011 | Anthony Wickstead | Queen's University of Belfast | Separable Banach lattices on which every bounded linear operator is regular |
| 25 February 2011 | John Hunton | University of Leicester | What is an attractive shape? |
| 4 March 2011 | Martin Mathieu | Queen's University of Belfast | A new formula for the local multiplier algebra |
| 11 March 2011 | Lina Oliveira | Instituto Superior Tecnico, Lisbon | On norm closed Lie ideals of nest algebras |
| 18 March 2011 | Joachim Zacharias | University of Nottingham | On groups with the invariant translation approximation property |
| 25 March 2011 | Karin Erdmann | University of Oxford | Complexity for modules of finite-dimensional algebras |
| 1 April 2011 | Adrian Wadsworth | University of California, San Diego | SK_1 of finite-dimensional division algebras |
| 8 April 2011 | Mihalis Anoussis | University of the Aegean | Angles in C*-Algebras |
| 15 April 2011 | Mark Wildon | Royal Holloway, University of London | Commuting conjugacy classes in finite groups |
| 13 May 2011 | Radha Kessar | University of Aberdeen | Finiteness questions in modular representation theory of finite groups |
| 7 October 2011 | Tony Dorlas | DIAS, Dublin | Quantum channels for classical information and the strong converse |
| 14 October 2011 | Natalia Iyudu | Queen's University Belfast | The Anick conjecture on the minimal Hilbert series of quadratic algebras |
| 21 October 2011 | Alexander Premet | University of Manchester | On the Gelfand-Kirillov conjecture for simple Lie algebras |
| 28 October 2011 | Andrey Lazarev | University of Leicester | Maurer-Cartan equation and rational homotopy theory |
| 4 November 2011 | Savvas Papapanayides | Queen's University of Belfast | Reflexivity of subspace lattices, property (p) and the ultraweak rank one density property |
| 11 November 2011 | Dirk Schuetz | University of Durham | Configuration spaces of closed linkages |
| 18 November 2011 | Richard Timoney | Trinity College Dublin | Embeddings in B(H) of ideals and tensor products of JC*-triples |
| 25 November 2011 | Thomas Huettemann | Queen's University of Belfast | Finite domination of chain complexes |
| 2 December 2011 | Andreas Winter | University of Bristol |
Zero-error communication via quantum channels, non-commutative graphs and a quantum Lovasz number |
| 9 December 2011 | Yuri Melnikov | Brussels | Spectral analysis for a class of integral-difference operators |
| 9 December 2011 at 4 pm in DBB/01/006 | Yuri Melnikov | Brussels | EU funding for advanced research and international cooperation |
| 16 December 2011 | Madeeha Khalid | DCU | K3 surfaces and matrix algebras |
