Grobner bases via linkage for classes of generalized determinantal ideals

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Date
2022-04-12Author
Neye, Emmanuel O
ORCID
0000-0003-1201-754XType
ThesisDegree Level
DoctoralMetadata
Show full item recordAbstract
Grobner bases are an important tool for working with ideals in polynomial rings. They have both computational and theoretical importance. In this dissertation, we produce Grobner bases for some families of generalized determinantal ideals. Our main contribution is a Grobner basis for Schubert patch ideals.
Schubert patch ideals are prime defining ideals of open patches of Schubert varieties in the type A flag variety. We adapt E. Gorla, J. Migliore, and U. Nagel's "Grobner basis via linkage" technique to prove a conjecture of A. Yong, namely, the essential minors of every Schubert patch ideal form a Grobner basis. Using the same approach, we recover the result of A. Woo and A. Yong that the essential minors of a Kazhdan-Lusztig ideal (and hence, essential minors of a Schubert determinantal ideal) form a Grobner basis with respect to an appropriate term order. In addition, with respect to the standard grading, we show that homogeneous Schubert patch ideals, homogeneous Kazhdan-Lusztig ideals and Schubert determinantal ideals are glicci. In the last chapter of this dissertation, we briefly discuss some future directions.
Degree
Doctor of Philosophy (Ph.D.)Department
Mathematics and StatisticsProgram
MathematicsSupervisor
Rajchgot, JennaCommittee
Rayan, Steven; Franc, Cameron; Szafron, Michael; Wang, Jiun-ChauCopyright Date
April 2022Subject
Grobner basis
Schubert patch ideal
Kazhdan-Lusztig ideal
Schubert determinantal ideal
Schubert varieties
Glicci
Vertex decomposable