Gyroharmonic Analysis on Relativistic Gyrogroups

Document Type : Special Issue: AIMC 51

Author

Center for Research and Development in Mathematics and Applications (CIDMA), University of Aveiro 3810-193 Aveiro, Portugal

Abstract

‎Einstein‎, ‎Möbius‎, ‎and Proper Velocity gyrogroups are relativistic gyrogroups that appear as three different realizations of the proper Lorentz group in the real Minkowski space-time Rn,1. Using the gyrolanguage we study their gyroharmonic analysis‎. ‎Although there is an algebraic gyroisomorphism between the three models we show that there are some differences between them‎. ‎Our study focus on the translation and convolution operators‎, ‎eigenfunctions of the Laplace-Beltrami operator‎, ‎Poisson transform‎, ‎Fourier-Helgason transform‎, ‎its inverse‎, ‎and Plancherel's Theorem‎. ‎We show that in the limit of large t, t⇒‎ +∞, the resulting gyroharmonic analysis tends to the standard Euclidean harmonic analysis on Rn, thus unifying hyperbolic and Euclidean harmonic analysis‎.

Keywords

Main Subjects


1. L. V. Ahlfors, Möbius transformations in several dimensions, University of Minnesota School of Mathematics, Minneapolis, 1981.
2. L. V. Ahlfors, Möbius transformations in Rn expressed through 2×2 matrices of Clifford numbers, Complex Variables 5 (1986) 215 - 221.

3. M. A. Alonso, G. S. Pogosyan, K. B. Wolf, Wigner functions for curved spaces I: on hyperboloids,
J. Math. Phys. 43 (12) (2002) 5857 - 5871.
4. ‎A. Boussejra‎, ‎A. Intissar‎, ‎L2-Concrete spectral analysis‎ of the invariant Laplacian α;β in the unit‎ complex ball Bn‎, ‎J‎. ‎Funct‎. ‎Anal.  160 (1998) 115-140‎.

5. ‎A. Boussejra‎, ‎M. Zouhair‎, ‎‎Coherent states ‎
quantization of generalized Bergman‎ spaces on the unit ball of Cn ‎ with a new formula for their associated berezin‎ transforms‎, ‎Arxiv preprint:1204.0934 (2012)‎.
 
6. ‎J. L. Chen‎, ‎A. A. Ungar‎, ‎From the group SL(2; C) to gyrogroups and gyrovector spaces and ‎ hyperbolic geometry‎, ‎Found‎. ‎Phys.‎ 31 (11) (2001) 1611-1639.

7.
‎M. Ferreira‎, ‎Gyrogroups in Projective‎
Hyperbolic Clifford Analysis‎, ‎in‎:‎‎Hypercomplex Analysis and‎ Applications‎ -‎Trends in Mathematics, ‎I‎. ‎Sabadini‎, ‎F‎. ‎Sommen (Eds.)‎, ‎Springer‎, ‎Basel‎, ‎2011‎.

8. M. Ferreira, G. Ren, Möbius gyrogroups: a Clifford algebra approach,
J. Algebra 328 (1) (2011) 230-253.

9. M. Ferreira, Harmonic analysis on the Einstein gyrogroup,
J. Geom. Symm. Phys. 35 (2014) 21-60.

10. M. Ferreira, Harmonic analysis on the Möbius gyrogroup,
J. Fourier Anal. Appl. 21 (2) (2015) 281 - 317.

11. M. Ferreira, Harmonic analysis on the proper velocity gyrogroup,
Banach J. Math. Anal. 11 (1) (2017) 21–49.

12. A. Grigor
;yan, Heat Kernel and Analysis on Manifolds, AMS/IP Studies in Advanced Mathematics, Vol. 47, American Mathematical Society, providence, RI, 2009.

13. S. Helgason,
Groups and Geometric Analysis, Academic Press, Orlando FL, 1984.

14. S. Helgason,
Geometric Analysis on Symmetric Spaces, AMS, Providence, RI, 1994.

15. A. Kasparian, A. A. Ungar, Lie gyrovector spaces,
J. Geom. Symm. Phys. 1 (1) (2004) 3-53.
 
16. ‎Y. Katznelson‎, ‎An Introduction to ‎ Harmonic Analysis‎, Third edition‎, ‎Cambridge‎ University Press‎, ‎2004‎.

17. T. H. Koornwinder, A new proof of a Paley-Wiener type theorem for the Jacobi transform,
Ark. Mat. 13 (1975) 145-159.

18. ‎T‎. ‎H. Koornwinder‎, ‎Jacobi Functions and Analysis‎
on Noncompact Semisimple Lie Groups‎, ‎ Special Functions‎: Group Theoretical Aspects‎ and Applications‎, ‎Mathematics and Its Applications‎,‎ Vol‎. ‎18‎, ‎R‎. ‎A‎. ‎Askey‎, ‎T‎. ‎H‎. Koornwinder‎, ‎W‎. ‎Schempp (Eds.) 1-84‎, ‎Springer‎, ‎Dordrecht‎, ‎1984‎.

19.
‎C. Liu‎, ‎L. Peng‎, ‎Generalized Helgason-Fourier‎
transforms associated to variants of the‎ Laplace-Beltrami operators on the unit ball in‎ Rn, ‎Indiana Univ‎. ‎Math‎. ‎J. ‎ 58 (3) (2009) 1457-1492‎.

20. J, Malzan, Quantum mechanics presented as Harmonic analysis,
Int. J. Theor. Phys. 9 (5) (1974) 305-321.

21. R. S. Strichartz, Harmonic analysis as spectral theory of Laplacians,
J. Funct. Anal. 87 (1989) 51-148.

22. E. Stein, G. Weiss,
Introduction to Fourier Analysis on Euclidean Spaces, Princeton University Press, 1971.

23. A. Terras,
Harmonic Analysis on Symmetric Spaces - Euclidean Space, the Sphere, and the Poincaré Upper Half Plane, Second Edition, Springer, New York, 2013.

24.
‎A. A. Ungar‎, Thomas precession and the‎‎
parametrization of‎ ‎the Lorentz transformation‎ group‎, ‎Found‎.
Phys‎. ‎Lett. 1 (1988) 57-89‎.

25. A. A. Ungar, Thomas precession and its associated grouplike structure,
Am. J. Phys. 59 (1991) 824 - 834.

26. A. A. Ungar, Thomas precession: its underlying gyrogroup axioms and their use in hyperbolic geometry and relativistic physics,
Found. Phys. 27 (6) (1997)881-951.

27. A. A. Ungar,
Analytic Hyperbolic Geometry - Mathematical Foundations and Applications, World Scientific, Singapore, 2005.

28. A. A. Ungar, The proper-time Lorentz group demystified,
J. Geom. Symm. Phys. 4 (2005) 69-95.

29.
‎A. A. Ungar‎, ‎Analytic Hyperbolic‎‎
Geometry and Albert‎ Einstein's Special Theory of Relativity‎, ‎ World Scientific‎, ‎Singapore‎, ‎2008‎.
30. A. A. Ungar, Barycentric Calculus in Euclidean and Hyperbolic Geometry: A Comparative Introduction, World Scientific Publishing Co. Pte. Ltd., Hackensack, NJ 2010.

31. A. A. Ungar,
Hyperbolic Triangle Centers: The Special Relativistic Approach, Springer-Verlag, New York 2010.

32. A. A. Ungar, Hyperbolic geometry,
J. Geom. Symm. Phys. 32 (2013) 61-86.

33.
‎A. A. Ungar‎, ‎ Analytic Hyperbolic Geometry‎‎
in n Dimensions‎: ‎An Introduction, ‎CRC Press‎, ‎Boca Raton,FL‎, 2015‎.

34.
‎V. V. Volchkov‎, Vit. V. Volchkov‎,‎
Harmonic Analysis of Mean Periodic ‎ Functions on Symmetric Spaces and the Heisenberg Group, ‎Springer-Verlag‎, ‎London‎, ‎2009‎.

35. G. Zhang, A weighted Plancherel formula, II. The case of the unit ball,
Studia Math. 102 (1992) 103-120.