The seminar is joint for the division of Analysis and Probability and its main themes are Mathematical Physics, Probability Theory and Harmonic and Functional Analysis. The seminar is encouraged to be aimed at a broader audience, but some talks may be of a more specialised nature. The talks in the seminar are usually 60 minutes, including questions.

The seminar gradually returns to campus with possibility to attend online via Zoom (subject to technology working).
See schedule below for links to Zoom meetings.

Should you have any questions or suggestions, feel free to email one of the organizers Jakob Björnberg (jakobbj 'at' chalmers.se, Probability Theory), Erik Broman (broman 'at' chalmers.se, Probability Theory) or Clemens Weiske (weiske 'at' chalmers.se, Analysis).

While the research on water waves modelled by Euler's equations has a long history, mainly in the last two decades travelling periodic rotational waves have been constructed with mathematical rigour by means of bifurcation theorems. After introducing the problem, I will present a new reformulation of this travelling periodic water wave problem in two dimensions. Using conformal mappings and a new reformulation of Bernoulli's equation, the problem is equivalently cast into the form “identity plus compact”, which is amenable for Rabinowitz' global bifurcation theorem. The main advantages (and the novelty) of this new reformulation are that no simplifying restrictions on the geometry of the surface profile and no simplifying assumptions on the vorticity distribution (and thus no assumptions regarding the absence of stagnation points or critical layers) have to be made. Within the scope of this new formulation, local and global families of solutions, bifurcating from laminar flows with a flat surface, are constructed. Moreover, I will further discuss the condition for local bifurcation and the possible alternatives for the global set of solutions, as well as their nodal properties. This is joint work with Erik Wahlén.

Should you have any questions or suggestions, feel free to email one of the organizers Jakob Björnberg (jakobbj 'at' chalmers.se, Probability Theory), Erik Broman (broman 'at' chalmers.se, Probability Theory) or Clemens Weiske (weiske 'at' chalmers.se, Analysis).

**Coming seminars****2022-09-27 at 13:15, MVL14 and zoom**

Jörg Weber (Lund)Jörg Weber (Lund)

*Travelling periodic water waves*While the research on water waves modelled by Euler's equations has a long history, mainly in the last two decades travelling periodic rotational waves have been constructed with mathematical rigour by means of bifurcation theorems. After introducing the problem, I will present a new reformulation of this travelling periodic water wave problem in two dimensions. Using conformal mappings and a new reformulation of Bernoulli's equation, the problem is equivalently cast into the form “identity plus compact”, which is amenable for Rabinowitz' global bifurcation theorem. The main advantages (and the novelty) of this new reformulation are that no simplifying restrictions on the geometry of the surface profile and no simplifying assumptions on the vorticity distribution (and thus no assumptions regarding the absence of stagnation points or critical layers) have to be made. Within the scope of this new formulation, local and global families of solutions, bifurcating from laminar flows with a flat surface, are constructed. Moreover, I will further discuss the condition for local bifurcation and the possible alternatives for the global set of solutions, as well as their nodal properties. This is joint work with Erik Wahlén.

**2022-10-11 at 13:15, MVL14 and zoom**

Makoto Yamashita (Oslo)

Makoto Yamashita (Oslo)

*Title to be announced*

**2022-10-25 at 13:15, MVL14 and zoom**

Daniel Ahlberg (Stockholm University)

Daniel Ahlberg (Stockholm University)

*Title to be announced*

**

**2022-11-08 at 13:15,**MVL14 and zoom

Fredrik Viklund (KTH)

Fredrik Viklund (KTH)

*Title to be announced*

**2022-11-15 at 13:15,**MVL14 and zoom

**Stas Volkov (Lund)**

*Title to be announced*

*2022-11-22 at 13:15, MVL14 and zoom*

Nadia Larsen (Oslo)

*Title to be announced*

2022-12-06 at 13:15, MVL14 and zoom

Michael Björklund (Chalmers)

Michael Björklund (Chalmers)

*Title to be announced***

2022-12-13 at 13:15, MVL14 and zoom

Caleb Eckhardt (Miami University)

Caleb Eckhardt (Miami University)

*Title to be announced*2023-02-07 at 13:15, MVL14 and zoom

Sergey Neshveyev (Oslo)

Sergey Neshveyev (Oslo)

*Title to be announced*

**Pr**

**evious seminars**

**2022-02-15 at 14:15-15:15, MVL15 and Zoom**

Hannes Thiel (K

Hannes Thiel (K

**i**

**el)**

*T*

*he generator problem for C*-algebras*

**2022-03-01 at 13:15-14:15, MVL14 and Zoom**

Volodymyr Rybalko (Institute for Low Temperature Physics and Engineering, Ukraine)

Volodymyr Rybalko (Institute for Low Temperature Physics and Engineering, Ukraine)

*Emergence of travelling waves and their stability in a free boundary model of cell motility*

**2022-03-08 at 13:15-14:15, MVL14 (and Zoom)**

Julian Kranz

Julian Kranz

*Amenable groupoids and the weak containment property*

**2**

**022-04-05 at 13:15, MVL14 and Zoom**

Daniel Ueltschi (Warwi

Daniel Ueltschi (Warwi

**c**

**k, UK)**

*D*

*imerisation*

*in quantum spin chains*

**2022-04-12 at 13:15, MVL14 and Zoom; joint AP and CAM seminar**

Andreas Rosén (Göteborg

Andreas Rosén (Göteborg

**)**

**2022-**

**05-17 at 13:15, MVL14 and Zoom**

Quentin Labriet (Aarhus, Denmark)

Quentin Labriet (Aarhus, Denmark)

*About branching problems for holomorphic discrete series*

**2022-05-24 at 13:15, MVL14 and Zoom**

Ivan Todorov

Ivan Todorov

*Morita equivalence for operator s*

*ystems*

**2022-06-02 at 15:15, MVL14 and Zoom (note: unusual time and day)**

John Griesmer (Colorado, Mines)

John Griesmer (Colorado, Mines)

*Rigidity Sequences for Measure Preserving Transformations*

**2022-06-07 at 13:15, MVL14 and Zoom**

Klaus Kröncke (KTH)

Klaus Kröncke (KTH)

*A*

*LE ma*

*nifolds*