TY - JOUR AU - Singer, Michael F. AB - We develop the representation theory for reductive linear differential algebraic groups (LDAGs). In particular, we exhibit an explicit sharp upper bound for orders of derivatives in differential representations of reductive LDAGs, extending existing results, which were obtained for SL2 in the case of just one derivation. As an application of the above bound, we develop an algorithm that tests whether the parameterized differential Galois group of a system of linear differential equations is reductive and, if it is, calculates it. TI - Reductive Linear Differential Algebraic Groups and the Galois Groups of Parameterized Linear Differential Equations JF - International Mathematics Research Notices DO - 10.1093/imrn/rnt344 DA - 2015-01-10 UR - https://www.deepdyve.com/lp/oxford-university-press/reductive-linear-differential-algebraic-groups-and-the-galois-groups-7YU1AWm4cV SP - 1733 EP - 1793 VL - 2015 IS - 7 DP - DeepDyve ER -