arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1402.4082math.NTmath.RT
收藏

关于局部域上L-包和阿贝尔簇的注记

A note on L-packets and abelian varieties over local fields

Jeff Achter, Clifton Cunningham

摘要:

局部域K上维数为g的极化阿贝尔簇(X,λ)决定了GSpin_{2g+1}(K)的一个容许表示.我们证明了该表示对Spin_{2g+1}(K)的限制是可约的,当且仅当X通过K的二次非分歧扩张与其扭曲同构。当g=1,K = Q_p时,我们恢复了一个众所周知的事实:椭圆曲线E上的容许GL_2(K)表示在约束下可约为SL_2(K)当且仅当E有超奇约化.

英文摘要:

A polarized abelian variety (X,λ) of dimension g over a local field K determines an admissible representation of GSpin_{2g+1}(K). We show that the restriction of this representation to Spin_{2g+1}(K) is reducible if and only if X is isogenous to its twist by the quadratic unramified extension of K. When g=1 and K = Q_p, we recover the well-known fact that the admissible GL_2(K) representation attached to an elliptic curve E is reducible upon restriction to SL_2(K) if and only if E has supersingular reduction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑