Program v akademickém roce 2021/2022
5. 5. 2022, 10:00
Somnath Hazra, An introduction to homogeneous operators.
The seminar will be held online via Google Meet link https://meet.google.com/yky-qxgf-xob
19. 4. 2022, 13:00
Petr Blaschke, Level curves, inverse functions and multiple saddle point method.
7. 4. 2022, 10:00
Miroslav Engliš, Quantization and reproducing kernels - an excursion.
The seminar will be held online via Google Meet link https://meet.google.com/yky-qxgf-xob
22. 3. 2022, 13:00
Noè Angelo Caruso, Krylov-solvability of inverse linear problems on Hilbert space.
25. 11. 2021, 11:25 - 12:10
Jaroslav Bradík, Calculating weighted harmonic Bergman kernel and asymptotic expansion of the harmonic Berezin transform on half-space.
The seminar will be held online via Google Meet link https://meet.google.com/yky-qxgf-xob
4. 11. 2021, 11:25 - 12:10
Somnath Hazra, Homogeneous operators in the Cowen-Douglas class over the Poly-disc.
21. 10. 2021, 9:25 - 10:10
Miroslav Engliš, Balanced metrics on complex domains.
30. 9. 2021, 11:25 - 12:10
Petr Blaschke, Hypergeometrization.
Abstract:
We will introduce and discuss properties of "hypergeometrization", i.e.
an operator acting on smooth functions given by
$$ f\left(\begin{array}{c} a \\ c
\end{array};x\right):=\sum_{k=0}^{\infty}\frac{f^{(k)}(x)}{k!}
\frac{(c-a)_k}{(c)_k}(-x)^k, $$
where $c$, $a$ are given numbers and $f$ is a smooth function.
Generalized hypergeometric functions and their multivariate generalization
can obtained by successive application of this operator on elementary
functions. Hypergeometrization also converts an elementary identity into
transformation rule of special functions. Finally, properties of the
operator can link together many seemingly disconnected identities. For
instance, from a single property of hypergeometrization (a special case of
change of variable) we can deduce Pfaff transform, quadratic transform of
2F1, reduction of Appell˙s F1 to 3F2 and to 2F1, link between G2 and F1
functions and many more.
