10.25394/PGS.12731012.v1 Monte J Cooper Monte J Cooper BOUNDING THE DEGREES OF THE DEFINING EQUATIONSOF REES RINGS FOR CERTAIN DETERMINANTAL AND PFAFFIAN IDEALS Purdue University Graduate School 2020 Rees algebras defining equations determinantal ideals pfaffian Algebra Algebraic and Differential Geometry 2020-07-29 01:46:44 Thesis https://hammer.purdue.edu/articles/thesis/BOUNDING_THE_DEGREES_OF_THE_DEFINING_EQUATIONSOF_REES_RINGS_FOR_CERTAIN_DETERMINANTAL_AND_PFAFFIAN_IDEALS/12731012 We consider ideals of minors of a matrix, ideals of minors of a symmetric matrix, and ideals of Pfaffians of an alternating matrix. Assuming these ideals are of generic height, we characterize the condition $G_{s}$ for these ideals in terms of the heights of smaller ideals of minors or Pfaffians of the same matrix. We additionally obtain bounds on the generation and concentration degrees of the defining equations of Rees rings for a subclass of such ideals via specialization of the Rees rings in the generic case. We do this by proving that, given sufficient height conditions on ideals of minors or Pfaffians of the matrix, the specialization of a resolution of a graded component of the Rees ring in the generic case is an approximate resolution of the same component of the Rees ring in question. We end the paper by giving some examples of explicit generation and concentration degree bounds.