__Conferences and thematic workshops:__

**Banach Algebras, Harmonic Analysis, and Operator Theory**,

Sardar Patel University, V. V. Nagar, India, 20–22

^{nd}November 2018

**Function Spaces XII**,

Kraków, Poland, 9–14

^{th}July 2018

Talk slides:

*On the problem of openness of convolutions on discrete groups*.

**Geometrical Aspects of Banach Spaces**,

Birmingham, 25–29

^{th}June 2018

Talk slides: (1+)-

*separation in the unit sphere of a Banach space*.

**Young Mathematicians in C*-Algebras**,

Copenhagen, Denmark, 7–11

^{th}August 2017

**Geometric Measure Theory**,

University of Warwick, 10–14

^{th}July 2017

*Co-organiser*.

**Geometric Topology and Geometry of Banach Spaces,**

Eilat Campus of Ben-Gurion University of the Negev, Israel, 14–19

^{th}May 2017

Talk slides:

*Separated subsets of the unit sphere of a Banach space.*

**45**,

^{th}Winter School in Abstract AnalysisSvratka, Czech Republic, 14–21

^{st}January 2017

Talk:

*Recovering a compact space from the family of its continuous, scalar-valued functions: the old and the new.*

**Virginia Operator Theory and Complex Analysis Meeting**,

University of Richmond, United States, 8

^{th}October 2016

Invited talk:

*Recovering a compact space from the family of its continuous, scalar-valued functions: the old and the new.*

**Young Mathematicians in C*-Algebras**,

Münster, Germany, 25–29

^{th}July 2016

Talk:

*Compatibility morphisms between commutative C*-algebras*

**Transfinite methods in Banach spaces and algebras of operators**,

Będlewo, Poland, 17

^{th}–23

^{rd}July 2016

Talk slides:

*Closed ideals of operators on and complemented subspaces of Banach spaces of functions with countable support.*

**The Stone–Cech Compactification: Theory and Applications,**

Centre for Mathematical Sciences, University of Cambridge, 6–8

^{th}July 2016

**The mathematical legacy of Uffe Haagerup**,

Copenhagen, Denmark, 24–26

^{th}June 2016

**44**

^{th}Winter School in Abstract Analysis,Svratka, Czech Republic, 16

^{th}–23

^{rd}January 2016

Talk:

*Ideal structure of the algebra of bounded operators acting on a Banach space.*

**Young Mathematicians in C*-Algebras,**

University of Copenhagen, Denmark, 17–21

^{th}August 2015

Talk slides:

*On C*–algebras that do not decompose into tensor products*

*.*

**QOP Meeting: Quantum Probability, Groups and Geometry**,

IMPAN, Warszawa, 7–11

^{th}April 2015

**Heidelberg Laureate Forum: Abel-, Fields- and Turing-Laureates Meet the Next Generation**,

Heidelberg, Germany, 21

^{st}–26

^{th}September 2014

Workshop organised:

*Independence results in Mathematics*

**Workshop on Ordered Banach Algebras,**

Lorentz Centre, Leiden, The Netherlands, 21

^{st}–25

^{th}June 2014.

**Workshop on Applications of model theory to C*-algebras,**

Münster, Germany, 7–11

^{th}July 2014.

**Integration, Vector Measures and Related Topics,**

Będlewo, Poland, 15

^{th}–21

^{st}June 2014.

Talk:

*Which algebras of operators on Banach spaces are Grothendieck?*

**Young Functional Analysts' Workshop 2014,**

Lancaster University, 22

^{nd}–24

^{th}April 2014,

Talk:

*Universality problems in operator algebras from the perspective of back–and–forth methods in model theory*

**Heidelberg Laureate Forum: Abel-, Fields- and Turing-Laureates Meet the Next Generation,**

Heidelberg, Germany, 22

^{nd}–27

^{th}September 2013

**Classifying Structures for Operator Algebras and Dynamical Systems,**

Aberystwyth, 16–20

^{th}September 2013

**School and workshop: Topics in Operator Algebras and Applications,**Madrid, Spain, 2

^{nd}–6

^{th}September 2013

**Banach algebras and applications,**

Gothenburg, Sweden, 29

^{th}July – 4

^{th}August 2013

Talk slides:

*Maximal left ideals of operators acting on a Banach space*

**QOP Meeting: C*–algebras and Banach algebras,**

Warsaw, Poland, 8–12

^{th}July 2013

**QOP Meeting: Banach and operator spaces,**

Lancaster, 29–30

^{th}April 2013

Invited talk:

*Operators from C(K)–spaces which annihilate certain chains of functions*

**Young Functional Analysts' Workshop 2013,**University of Sheffield, 20

^{th}–22

^{nd}March 2013

Talk:

*Which algebras of operators on Banach spaces are Grothendieck spaces?*

**Thematic Program on Forcing and its Applications: Workshop on Applications to Operator Algebras,**

Fields Institute, Toronto, Canada, 10–14

^{th}September 2012

**Appalachian Set Theory Workshop,**

Fields Institute, Toronto, Canada, 8–9

^{th}September 2012

**Geometry of Banach spaces,**

Centre International de Rencontres Mathématiques, Luminy, Marseille, France, 27

^{th}–31

^{st}August 2012

**Trends in set theory,**

Warsaw, Poland, 8–11

^{th}July 2012

Talk abstract:

*Operator ideal of weakly compactly generated operators*

**Banach Spaces Workshop,**

Birmingham, 6–9

^{th}June 2012

**Young Functional Analysts' Workshop 2012,**

University of Oxford, 21

^{st}–22

^{nd}March 2012

Talk slides:

*Closed ideals of the Banach algebra of bounded operators on the Banach space C[0,ω*

_{1}]**Banach Algebras 2011,**

Waterloo, Ontario, Canada, 3–10

^{th}August 2011.

Talk slides:

*Uniqueness of the maximal ideal of the Banach algebra of bounded operators on C([0, ω*

_{1}])**Operator Theory and its Applications in honour of Victor Shulman,**

Gothenburg, Sweden, 26–29

^{th}April 2011

**Set–theoretic Techniques in Functional Analysis Banach Space Meeting 2011,**

Castro Urdiales, Cantabria, Spain, 21

^{st}–24

^{th}February 2011

__Invited seminar talks:__

October 16, 2018

*An update on the problem of openness of multiplication in a Banach algebra*, Abstract Analysis Seminar, Czech Academy of Sciences, Prague, Czech Republic.

April 10, 2018

*Some new results on separated subsets of the unit sphere of a Banach space*, Adam Mickiewicz Unieversity in Poznań, Poland

March 1, 2018

*When is multiplication in a Banach algebra open?*, University of Kielce, Poland

February 27, 2018

*When is multiplication in a Banach algebra open?*, Technical University of Łódź, Poland

January 30, 2018

*When is multiplication in a Banach algebra open?*, Operator algebras seminar, University of Münster, Germany.

March 21, 2017

*Steinhaus' lattice-point problem for Banach spaces*, Technical University of Łódź, Poland

January 26, 2017

*Recovering a compact space from the family of its continuous, scalar-valued functions: the old and the new.*, Applied Mathematics Seminar, University of Portsmouth.

January 4, 2017

*Steinhaus' lattice-point problem for Banach spaces*, ATH, Bielsko-Biała, Poland.

December 19, 2016

December 14, 2016

October 21, 2016

*Steinhaus' lattice-point problem for Banach spaces*, Set Theory & Analysis Seminar, Czech Academy of Sciences, Prague, Czech Republic.

October 5, 2016

*Steinhaus' lattice-point problem for Banach spaces*, Washington and Lee University, Lexington, Virginia, United States.

October 4, 2016

*Separated subsets in the unit sphere of a Banach space*, University of Virginia, Charlottesville, Virginia, United States.

June 14, 2016

*Recovering a compact Hausdorff space X from the compatibility ordering on C(X)*, Set Theory & Analysis Seminar, Czech Academy of Sciences, Prague, Czech Republic.

April 6, 2016

*Separated subsets in the unit sphere of a Banach space*, Seminar on Geometry of Banach spaces, Jagiellonian University in Kraków, Poland.

April 5, 2016

*Variations of the Steinhaus' lattice–point problem in Banach spaces*, Functional Analysis Seminar, Adam Mickiewicz University in Poznań, Poland.

April 4, 2016

*Decomposing the Calkin algebra into tensor products of C*–algebras*, Real Analysis Seminar, University of Silesia, Katowice, Poland.

January 27, 2016

*Two études about the matrix trace*, ATH, Bielsko-Biała, Poland.

January 13, 2016

*Ideal structure of the algebra of bounded operators acting on a Banach space*, Seminar on Geometry of Banach spaces, Jagiellonian University in Kraków, Poland.

January 13, 2016

*Steinhaus' lattice–point problem for Banach spaces*, Seminar on Methods of Approximation Theory, Jagiellonian University in Kraków, Poland.

January 12, 2016

*Tensorial decompositions of the Calkin algebra and related objects*, Seminar on Functional Analysis, Jagiellonian University in Kraków, Poland.

September 29, 2015

*The Calkin algebra does not decompose into a tensor product of two infinite–dimensional C*–algebras*, University College Cork, Cork, Ireland.

June 10, 2014

*Maximal left ideals of the algebra of bounded operators on a Banach space*, Functional Analysis Seminar, Adam Mickiewicz University in Poznań, Poland.

January 23, 2014

*Maximal left ideal structure of algebras of operators on Banach spaces*, Descriptive set theory seminar , University of Copenhagen.

November 11, 2013

*Maximal left ideals of operators acting on a Banach space*, University of Oxford, Mathematical Institute.

July 4, 2013

*Which algebras of operators on Banach spaces are Grothendieck?*, Analysis Group Seminar, University of Glasgow.

January 16, 2012

*Maksymalne ideały lewostronne w algebrach Banacha*(eng.

*Maximal left–ideals in Banach algebras*), Real Analysis Seminar, University of Silesia, Katowice, Poland.

January 12, 2012

*On classical operator ideals and the structure of the operator algebra on C([0,ω*, imPAN Seminar: Working Group in Applications of Set Theory, Warsaw, Poland.

_{1}]). Pt. II.January 10, 2012

*Operatory i miary wektorowe o obrazie zawartym w przestrzeni Banacha generowanej przez zbiór słabo zwarty*(eng.

*Operator and vectors measures with range lying in a WCG Banach space*), imPAN Seminar: Functional Analysis, Warsaw, Poland.

January 5, 2012

*On classical operator ideals and the structure of the operator algebra on C([0,ω*, imPAN Seminar: Working Group in Applications of Set Theory, Warsaw, Poland.

_{1}]). Pt. I.April 18, 2011

*Domknięte ideały w algebrach operatorów ograniczonych na przestrzeniach typu C(K)*(eng.

*Closed ideals in the algebras of bounded operators on C(K)–spaces*), Real Analysis Seminar, Technical University of Łódź, Poland

__Lancaster Pure Mathematics Postgraduate Forum talks:__

May 25, 2015

*How many norm-one continuous functions with distance greater than 1 are there?*

January 19, 2015

*Linear algebra from analyst's point of view*

November 4, 2013

*The Johnson-Lindenstrauss space*

October 31, 2013

*Killing uncountable chains of continuous functions*

February 5, 2013

*Around Pełczyński's decomposition method.*

March 8, 2011

*Beyond ZFC: Beauty of Jensen's Diamond Principle*

January 9, 2011

*Some Remarks on the Stone–Čech Compactification*

__Other events:__

Stochastic Analysis and Stochastic PDEs, Warwick University, 16–20

^{th}April 2012

EPSRC Symposium Workshop – 2012 UK Easter Probability Meeting, Warwick University, 26–30

^{th}March 2012

North British Functional Analysis Seminar, University of Edinburgh, 28

^{th}October 2011.

Analytical and Computer Assisted Methods in Mathematical Models, Bydgoszcz, Poland, 4–18

^{th}September 2011

14th International Workshop for Young Mathematicians "Algebra", Kraków, Poland, 10–16

^{th}July 2011

Talk slides:

*Radical–theoretic approach to ring theory*

LMS–EPSRC Short Course 2011, Mathematical Institute, University of Oxford, 3

^{rd}–8

^{th}April 2011

6

^{th}International Students’ Conference on Analysis,

Síkfőkút, Noszvaj, Hungary, 31

^{st}January–3

^{rd}February 2010.

4

^{th}International Students’ Conference on Analysis,

Zamárdi, Hungary, 2

^{nd}–6

^{th}February 2008

Talk:

*A Remark on homomorphisms on C(X)*