$ε$-Constants and Orthogonal Representations

On the Langlands parameter of a simple supercuspidal representation: odd orthogonal groups

In this work, we explicitly compute a certain family of twisted gamma factors of a simple supercuspidal representation $π$ of a $p$-adic odd orthogonal group. These computations, together with analogous computations for general linear groups carried out in previous work with Liu, allow us to give a prediction for the Langlands parameter of $π$. If we assume the "depth-preserving conjecture", we prove that our prediction is correct if $p$ is sufficiently large.

On the Langlands parameter of a simple supercuspidal representation: even orthogonal groups

Let $π$ be a simple supercuspidal representation of the split even special orthogonal group. We compute the Rankin-Selberg $γ$-factors for rank 1-twists of $π$ by quadratic tamely ramified characters of $F^*$. We then use our results to determine the Langlands parameter of $π$ up to its restriction to the wild inertia subgroup, subject to an analogue of a work of Blondel, Henniart, and Stevens for $SO_{2l}$. In the particular case of the field $\mathbb{Q}_2$, we are able to describe the parameter completely.

利用多重正交多项式对欧拉常数的有理逼近

Rational approximation of Euler's constant using multiple orthogonal polynomials

本文构造了欧拉常数的新有理逼近，优于先前结果，通过多重正交多项式简化Rivoal方法，并研究其丢番图与渐近性质。

On the formal degrees of square-integrable representations of odd special orthogonal and metaplectic groups

The formal degree conjecture relates the formal degree of an irreducible square-integrable representation of a reductive group over a local field to the special value of the adjoint $γ$-factor of its $L$-parameter. In this paper, we prove the formal degree conjecture for odd special orthogonal and metaplectic groups in the generic case, which combined with Arthur's work on the local Langlands correspondence implies the conjecture in full generality.

到不定正交群若干上同调表示的 theta 提升

Theta lifts to certain cohomological representations of indefinite orthogonal groups

本文利用 Borcherds 方法将全纯 Mp₂(ℝ) 尖点形式 theta 提升到不定正交群的上同调表示 Π 中，并通过 Fourier 展开计算与尖点支集分析确认所得自守形式的平方可积性。

Galois representations for even general special orthogonal groups

We prove the existence of $\mathrm{GSpin}_{2n}$-valued Galois representations corresponding to cohomological cuspidal automorphic representations of certain quasi-split forms of $\mathrm{GSO}_{2n}$ under the local hypotheses that there is a Steinberg component and that the archimedean parameters are regular for the standard representation. This is based on the cohomology of Shimura varieties of abelian type, of type $D^{\mathbb{H}}$, arising from forms of $\mathrm{GSO}_{2n}$. As an application, under similar hypotheses, we compute automorphic multiplicities, prove meromorphic continuation of (…

Symmetry breaking for orthogonal groups and a conjecture by B. Gross and D. Prasad

We consider irreducible unitary representations $A_i$ of G=SO(n+1,1) with the same infinitesimal character as the trivial representation and representations $B_j$ of H=SO(n,1) with the same properties and discuss H-equivariant homomorphisms Hom_H($A_i,B_j$). For tempered representations our results confirm the predictions of conjectures by B. Gross and D. Prasad.