Frenkel, EdwardGaitsgory, Dennis2010-08-122009Frenkel, Edward, and Dennis Gaitsgory. 2009. Local geometric langlands correspondence: The spherical case. In Algebraic analysis and around: In honor of Professor Masaki Kashiwara's 60th Birthday, ed. M. Kashiwara, T Miwa, et al, 167-186. Tokyo : Mathematical Society of Japan.97849314695180920-1971http://nrs.harvard.edu/urn-3:HUL.InstRepos:4341700A module over an affine Kac–Moody algebra $\hat{g}$ is called spherical if the action of the Lie subalgebra g[[t]] on it integrates to an algebraic action of the corresponding group G[[t]]. Consider the category of spherical $\hat{g}$-modules of critical level. In this paper we prove that this category is equivalent to the category of quasi-coherent sheaves on the ind-scheme of opers on the punctured disc which are unramified as local systems. This result is a categorical version of the well-known description of spherical vectors in representations of groups over local non-archimedian fields. It may be viewed as a special case of the local geometric Langlands correspondence proposed in [FG2].en-USquantum algebraalgebraic geometryrepresentation theoryMonograph or Book2010-08-12