Sharpness of Zapolsky's inequality for quasi-states and Poisson brackets

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January 2011, 18: 61-68. doi: 10.3934/era.2011.18.61

Sharpness of Zapolsky's inequality for quasi-states and Poisson brackets

1.	School of Mathematical Sciences, Tel Aviv University, Tel Aviv 69978, Israel

Received February 2011 Revised May 2011 Published July 2011

Abstract
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Zapolsky's inequality gives a lower bound for the $L_1$ norm of the Poisson bracket of a pair of $C^1$ functions on the two-dimensional sphere by means of quasi-states. Here we show that this lower bound is sharp.

Keywords: Quasi-state..

Mathematics Subject Classification: Primary: 53D9.

Citation: Anat Amir. Sharpness of Zapolsky's inequality for quasi-states and Poisson brackets. Electronic Research Announcements, 2011, 18: 61-68. doi: 10.3934/era.2011.18.61

References:

[1]	J. F. Aarnes, Quasi-states and quasi-measures,, Adv. Math., 86 (1991), 41. doi: 10.1016/0001-8708(91)90035-6.
[2]	J. F. Aarnes, Pure quasi-states and extremal quasi-measures,, Math. Ann., 295 (1993), 575. doi: 10.1007/BF01444904.
[3]	J. F. Aarnes, Construction of non-sub-additive measures and discretization of Borel measures,, Fund. Math., 147 (1995), 213.
[4]	A. Amir, Sharpness of Zapolsky inequality for quasi-states and Poisson brackets,, preprint, ().
[5]	L. Buhovsky, M. Entov and L. Polterovich, Poisson brackets and symplectic invariants,, preprint, ().
[6]	M. Entov and L. Polterovich, Quasi-states and symplectic intersections,, Comment. Math. Helv., 81 (2006), 75. doi: 10.4171/CMH/43.
[7]	M. Entov, L. Polterovich and F. Zapolsky, An "anti-Gleason" phenomenon and simultaneous measurements in classical mechanics,, Foundations of Physics, 37 (2007), 1306. doi: 10.1007/s10701-007-9158-0.
[8]	M. Entov, L. Polterovich and F. Zapolsky, Quasi-morphisms and the Poisson bracket,, Pure Appl. Math. Q., 3 (2007), 1037.
[9]	V. Guillemin and A. Pollack, "Differential Topology,", Prentice-Hall, (1974).
[10]	F. F. Knudsen, Topology and the construction of extreme quasi-measures,, Adv. Math., 120 (1996), 302. doi: 10.1006/aima.1996.0041.
[11]	F. F. Knudsen, New topological measures on the torus,, Fund. Math., 185 (2005), 287. doi: 10.4064/fm185-3-6.
[12]	S. Lang, "Differential and Riemannian Manifolds,", 3rd ed., 160 (1995).
[13]	M. E. Taylor, "Measure Theory and Integration,", Graduate Studies in Mathematics, 76 (2006).
[14]	F. Zapolsky, Isotopy-invariant topological measures on closed orientable surfaces of higher genus,, Math. Zeit., (). doi: 10.1007/s00209-0100788-0.
[15]	F. Zapolsky, Quasi-states and the Poisson bracket on surfaces,, J. Mod. Dyn., 1 (2007), 465.
[16]	F. Zapolsky, "Quasi-States and Symplectic Topology,", Ph.D. thesis, (2009).

show all references

References:

[1]	J. F. Aarnes, Quasi-states and quasi-measures,, Adv. Math., 86 (1991), 41. doi: 10.1016/0001-8708(91)90035-6.
[2]	J. F. Aarnes, Pure quasi-states and extremal quasi-measures,, Math. Ann., 295 (1993), 575. doi: 10.1007/BF01444904.
[3]	J. F. Aarnes, Construction of non-sub-additive measures and discretization of Borel measures,, Fund. Math., 147 (1995), 213.
[4]	A. Amir, Sharpness of Zapolsky inequality for quasi-states and Poisson brackets,, preprint, ().
[5]	L. Buhovsky, M. Entov and L. Polterovich, Poisson brackets and symplectic invariants,, preprint, ().
[6]	M. Entov and L. Polterovich, Quasi-states and symplectic intersections,, Comment. Math. Helv., 81 (2006), 75. doi: 10.4171/CMH/43.
[7]	M. Entov, L. Polterovich and F. Zapolsky, An "anti-Gleason" phenomenon and simultaneous measurements in classical mechanics,, Foundations of Physics, 37 (2007), 1306. doi: 10.1007/s10701-007-9158-0.
[8]	M. Entov, L. Polterovich and F. Zapolsky, Quasi-morphisms and the Poisson bracket,, Pure Appl. Math. Q., 3 (2007), 1037.
[9]	V. Guillemin and A. Pollack, "Differential Topology,", Prentice-Hall, (1974).
[10]	F. F. Knudsen, Topology and the construction of extreme quasi-measures,, Adv. Math., 120 (1996), 302. doi: 10.1006/aima.1996.0041.
[11]	F. F. Knudsen, New topological measures on the torus,, Fund. Math., 185 (2005), 287. doi: 10.4064/fm185-3-6.
[12]	S. Lang, "Differential and Riemannian Manifolds,", 3rd ed., 160 (1995).
[13]	M. E. Taylor, "Measure Theory and Integration,", Graduate Studies in Mathematics, 76 (2006).
[14]	F. Zapolsky, Isotopy-invariant topological measures on closed orientable surfaces of higher genus,, Math. Zeit., (). doi: 10.1007/s00209-0100788-0.
[15]	F. Zapolsky, Quasi-states and the Poisson bracket on surfaces,, J. Mod. Dyn., 1 (2007), 465.
[16]	F. Zapolsky, "Quasi-States and Symplectic Topology,", Ph.D. thesis, (2009).

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