Семинар Геометрија и примене, 23. новембар 2023.

• 20. Новембар, 2023
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Наредни састанак Семинара биће одржан онлајн у четвртак, 23. новембра 2023. са почетком у 17.15 часова.

Предавач: Handan Yıldırım, Istanbul University

Наслов предавања: ON LEGENDRIAN DUAL SURFACES OF A SPACELIKE CURVE IN THE 3-DIMENSIONAL LIGHTCONE
 
Апстракт:

In this talk which is based on the joint work with Kentaro Saji given in [3], taking into account the Legendrian dualities in [2] which are extensions of the Legendrian dualities in [1], we first introduce new extended Legendrian dualities for the 3-dimensional pseudo-spheres of various radii in Lorentz-Minkowski 4-space. Secondly, by connecting all of these Legendrian dualities continuously, we construct Legendrian dual surfaces (lying in these 3-dimensional pseudo-spheres) of a spacelike curve in the 3-dimensional lightcone. Finally, we investigate the singularities of these surfaces and show the dualities of the singularities of a certain class of such a surface in the 3-dimensional lightcone.

References:
[1] S. Izumiya, Legendrian dualities and spacelike hypersurfaces in the lightcone, Moscow Mathematical Journal, 9 (2009), 325-357.
[2] S. Izumiya, H. Yıldırım, Extensions of the mandala of Legendrian dualities for pseudo-spheres in Lorentz-Minkowski space, Topology and its Applications, 159 (2012), 509-518.
[3] K. Saji, H. Yıldırım, Legendrian dual surfaces of a spacelike curve in the 3-dimensional lightcone, Journal of Geometry and Physics, 179 (2022) 104593, 1-21

Линк за приступ предавању:

https://zoom.us/j/96662789349?pwd=eHc0ZlhTc1gxWmZKQVlXVG5seEprQT09

Meeting ID: 966 6278 9349
Passcode: 993427