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SUMMARY:Alessio Martini (University of Birmingham)
DTSTART:20210113T170000Z
DTEND:20210113T180000Z
DTSTAMP:20260423T035712Z
UID:HAeS/9
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HAeS/9/">Spe
 ctral multipliers for sub-Laplacians: recent developments and open problem
 s</a>\nby Alessio Martini (University of Birmingham) as part of Harmonic a
 nalysis e-seminars\n\n\nAbstract\nI will present some old and new results 
 about the $L^p$ functional calculus for sub-Laplacians $L$. It has been kn
 own for a long time that\, under quite general assumptions on the sub-Lapl
 acian and the underlying sub-Riemannian structure\, an operator of the for
 m $F(L)$ is bounded on $L^p$\, $1< p<\\infty$\,  whenever the multiplier $
 F$ satisfies a scale-invariant smoothness condition of sufficiently larger
  order.\nThe problem of determining the minimal smoothness assumptions\, h
 owever\, remains widely open and will be the focus of our discussion.\n
LOCATION:https://researchseminars.org/talk/HAeS/9/
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