Geodesic
Tubes, Cohomology with Growth Conditions and an Application to the Theta Correspondence
Canadian journal of mathematics, Tome 40 (1988) no. 1, pp. 1-37

Voir la notice de l'article provenant de la source Cambridge University Press

In this paper we continue our effort [11], [12], [13], [14] to interpret geometrically the harmonic forms on certain locally symmetric spaces constructed by using the theta correspondence. The point of this paper is to prove an integral formula, Theorem 2.1, which will allow us to generalize the results obtained in the above papers to the finite volume case (the previous papers treated only the compact case). We then apply our integral formula to certain finite volume quotients of symmetric spaces of orthogonal groups. The main result obtained is Theorem 4.2 which is described below. We let (,) denote the bilinear form associated to a quadratic form with integer coefficients of signature (p, q). We assume that the fundamental group Γ ⊂ SO(p, q) of our locally symmetric space is the subgroup of the integral isometries of (,) congruent to the identity matrix modulo some integer N. We assume that N is chosen large enough so that Γ is neat (the multiplicative subgroup of C* generated by the eigenvalues of the elements of Γ has no torsion), Borel [2], 17.1 and that every element in Γ has spinor norm 1, Millson-Raghunathan [15], Proposition 4.1. These conditions are needed to ensure that our cycles Cx (see below) are orientable. The methods we will use apply also to unitary and quaternion unitary locally symmetric spaces, see [13]. 
Kudla, Stephen S.; Millson, John J. Tubes, Cohomology with Growth Conditions and an Application to the Theta Correspondence. Canadian journal of mathematics, Tome 40 (1988) no. 1, pp. 1-37. doi: 10.4153/CJM-1988-001-4
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