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Multi angle  Theta lifts of tempered representations and Langlands parameters
Gan, Wee Teck (Auteur de la Conférence) | CIRM (Editeur )

In joint work with Hiraku Atobe, we determine the theta lifting of irreducible tempered representations for symplectic-metaplectic-orthogonal and unitary dual pairs in terms of the local Langlands correspondence. The main new tool for proving our result is the recently established local Gross-Prasad conjecture.

11F27 ; 11F70 ; 22E50

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Multi angle  Classification des représentations admissibles irréductibles modulo p des groupes réductifs p-adiques
Henniart, Guy (Auteur de la Conférence) | CIRM (Editeur )

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Multi angle  Quasisemisimple classes
Michel, Jean (Auteur de la Conférence) | CIRM (Editeur )

This is a report on joint work with François Digne. Quasisemisimple elements are a generalisation of semisimple elements to disconnected reductive groups (or equivalently, to algebraic automorphisms of reductive groups). In the setting of reductive groups over an algebraically closed field, we discuss the classification of quasisemisimple classes, including isolated and quasi-isolated ones. The talk will start with the basic theory of non-connected reductive groups. This is a report on joint work with François Digne. Quasisemisimple elements are a generalisation of semisimple elements to disconnected reductive groups (or equivalently, to algebraic automorphisms of reductive groups). In the setting of reductive groups over an algebraically closed field, we discuss the classification of quasisemisimple classes, including isolated and quasi-isolated ones. The talk will start with the basic theory of n...

20G15 ; 20G40 ; 20C33 ; 20G05

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Multi angle  Free post-Lie algebras, the Hopf algebra of Lie group integrators and planar arborification
Manchon, Dominique (Auteur de la Conférence) | CIRM (Editeur )

The Hopf algebra of Lie group integrators has been introduced by H. Munthe-Kaas and W. Wright as a tool to handle Runge-Kutta numerical methods on homogeneous spaces. It is spanned by planar rooted forests, possibly decorated. We will describe a canonical surjective Hopf algebra morphism onto the shuffle Hopf algebra which deserves to be called planar arborification. The space of primitive elements is a free post-Lie algebra, which in turn will permit us to describe the corresponding co-arborification process.
Joint work with Charles Curry (NTNU Trondheim), Kurusch Ebrahimi-Fard (NTNU) and Hans Z. Munthe-Kaas (Univ. Bergen).
The two triangles appearing at 24'04" and 25'19'' respectively should be understood as a #.
The Hopf algebra of Lie group integrators has been introduced by H. Munthe-Kaas and W. Wright as a tool to handle Runge-Kutta numerical methods on homogeneous spaces. It is spanned by planar rooted forests, possibly decorated. We will describe a canonical surjective Hopf algebra morphism onto the shuffle Hopf algebra which deserves to be called planar arborification. The space of primitive elements is a free post-Lie algebra, which in turn will ...

81T15 ; 16T05 ; 17D25 ; 65L06 ; 05C05

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Z
ion by a symmetric subgroup
Offen, Omer (Auteur de la Conférence) | CIRM (Editeur )

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Multi angle  Lecture 3: Period integrals of automorphic forms
Offen, Omer (Auteur de la Conférence) | CIRM (Editeur )

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Multi angle  Tame relatively supercuspidal representations
Murnaghan, Fiona (Auteur de la Conférence) | CIRM (Editeur )

Let G be a connected reductive p-adic group that splits over a tamely ramified extension. Let H be the fixed points of an involution of G. An irreducible smooth H-distinguished representation of G is H-relatively supercuspidal if its relative matrix coefficients are compactly supported modulo H Z(G). (Here, Z(G) is the centre of G.) We will describe some relatively supercuspidal representations whose cuspidal supports belong to the supercuspidals constructed by J.K. Yu. Let G be a connected reductive p-adic group that splits over a tamely ramified extension. Let H be the fixed points of an involution of G. An irreducible smooth H-distinguished representation of G is H-relatively supercuspidal if its relative matrix coefficients are compactly supported modulo H Z(G). (Here, Z(G) is the centre of G.) We will describe some relatively supercuspidal representations whose cuspidal supports belong to the supe...

22E50 ; 22E35