# Announcements

### Kharkiv Geometric Seminar

10 April 2018The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday,** 16****.04****.2018**

The talk "On foliations of nonnegative curvature on closed three-dimensional manifolds" by D. V. Bolotov

### Kharkiv Geometric Seminar

15 March 2018The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **19****.03****.2018**

The talk "Topology of singular foliations on surfaces" by Ye.O. Polulyakh (Institute of Mathematics of NAS of Ukraine, Kyiv) will be presented.

### Kharkiv Geometric Seminar

27 February 2018The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **05****.03****.2018**

### Kharkiv Geometric Seminar

21 February 2018The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **26****.02****.2018**

The talk "The Riemann-Hilbert problem and non-linear integral equations" by D.G. Shepelsky will be presented.

### Kharkiv Geometric Seminar

12 February 2018The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **19****.02****.2018**

The talk "Probabilistic and statistical problems on groups" by G.M. Feldman will be presented.

### Kharkiv Geometric Seminar

12 February 2018The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **05.02****.2018**

### Kharkiv Geometric Seminar

24 January 2018The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **29****.01.2018**

The talk "Closed geodesics on regular tetrahedra in the Lobachevsky space" by O.A. Borisenko and D.D. Sukhorebska will be presented.

### Kharkiv Geometric Seminar

15 January 2018The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **22.01.2018**

The talk "Automorphisms of foliations on two-dimensional non-compact surfaces" by Yu. Soroka (Taras Shevchenko Kyiv National University) will be presented.

### 11 December 2017

The meeting of Kharkiv Mathematical Society dedicated to the 150th anniversary of D.M. Sintsov will be held on December 19 at 15-15 in the A.V. Pogorelov Auditorium (room 6-49) of V.N. Karazin Kharkiv National University. The agenda includes two talks:

"The life of D.M. Sintsov" by O.A. Borisenko;

"Contact geometry of compact manifolds" by D.V. Bolotov.

### Kharkiv Geometric Seminar

21 September 2017The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **25.09.2017**

The talk "On gravitational waves II" by Yu.A. Aminov will be presented. The talk is dedicated to the memory of V.I. Denisov.

### Kharkiv Geometric Seminar

13 September 2017The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **18.09.2017**

The talk "On gravitational waves I" by Yu.A. Aminov will be presented.

### Kharkiv Geometric Seminar

13 September 2017The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **11.09.2017**

The talk "Diffeomorphisms of conformally Kähler manifolds" by Ye.V. Cherevko (Odesa National Economical University) will be presented.

### Kharkiv Geometric Seminar

6 March 2017The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, **13.03.2017**

Will the report of the **M. Grechneva** (Zaporizhzhya National University) ** «Differential geometry of surfaces of Minkowski space and its Grassmann image»**.

### Kharkiv Geometric Seminar

7 February 2017The next meeting of the Kharkiv Geometric Seminar (Head – Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, 13.02.2017.

Will the report of the B. Feshenko (Institute of Mathematics, National Academy of Sciences of Ukraine, Kiev) «Deformation of smooth functions on a 2-torus».

### Kharkiv Geometric Seminar

7 November 2016The next meeting of the Kharkiv Geometric Seminar (Head - Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, 07.11.16.

Will the report of the professor D. Bolotov «Layer analogue of Milnor's conjecture»

### Kharkiv Geometric Seminar

27 October 2016The next meeting of the Kharkiv Geometric Seminar (Head - Corresponding Member of NAS of Ukraine, Prof. A. Borisenko) will be held on Monday, 31.10.16.

Will the report of the professor D. Bolotov «Layer analogue of Milnor's conjecture»

### Kharkiv Geometric Seminar

25 April 2016On Monday, 25.04.2016, Kostiantyn Drach (Karazin University) will give a talk "Curvature flows of hypersurfaces in central force fields" (second part) (overview talk based on the paper O. Schnurer, K. Smoczyk, *Evolution of hypersurfaces in central force fields*).

### Kharkiv Geometric Seminar

18 April 2016On Monday, 18.04.2016, Kostiantyn Drach (Karazin University) will give a talk "Curvature flows of hypersurfaces in central force fields" (overview talk based on the paper O. Schnurer, K. Smoczyk, *Evolution of hypersurfaces in central force fields*).

### IV International Conference "Analysis and Mathematical Physics"

13 June 2016The Mathematical Division of the B. Verkin Institute for Low Temperature Physics and Engineering (Kharkiv, Ukraine) is organizing the IV International Conference "*Analysis and Mathematical Physics*", to be held at the ILTPE June 13-17, 2016.

### Conference "Modern Advances in Geometry and Topology"

12 September 2016The international conference **Modern advances in geometry and topology** will be held in Karazin University in honor of professor *Alexander A. Borisenko* to emphasize his diverse contribution to geometry and to celebrate his 70th birthday.

### Kharkiv Geometric Seminar

11 April 2016On Monday, 11.04.2016, Ihor Potapenko (Odessa National University) will give a talk "Infinitisimal deformations of surfaces with a fixed variation of Riemannian connection" (read the abstract, ukr).

### Kharkiv Geometric Seminar

4 April 2016The next meeting of the Kharkiv Geometric Seminar (Head - Corresponding Member of NAS of Ukraine, Prof. A. A. Borisenko) will be held on Monday, 04/04/16.

The talk will be given by I.U. Vlasenko (Institute of Mathematics of NASU) "Dynamics of internal maps" (read the abstract).

### Kharkiv Geometric Seminar

28 March 2016On Monday, 28.03.2016, Olena Shugailo (Karazin University) will give a talk "Affine curvature of flat geodesics on affine hypersurfaces" (read the abstract).

### Kharkiv Geometric Seminar

11 March 2016On Monday, 14.03.2016, Babenko V.I. (FTINT) will give a talk "Estimates of the Gaussian curvature is strictly convex surface, depending on its integral parameters".

### Kharkiv Geometric Seminar

1 February 2016On Monday, 01. 02. 2016 , Drach K.D. will give a talk "Extreme bounds for complete hypersurfaces in Riemannian spaces" (following the habilitation thesis (candidate of sciences) in geometry and topology).

### Kharkiv Geometric Seminar

30 November 2015On Monday, 30.11.2015, Gurin A.M. will give a talk "Alexandrov 's theorem of existence of a polyhedron with a given development".