1. OPERATORS BASED ON DOUBLE COSETS OF $GL_2$ Open Access Author: Meemark, Yotsanan Title: OPERATORS BASED ON DOUBLE COSETS OF $GL_2$ Graduate Program: Mathematics Keywords: Drinfeld modular formscharacter sum estimatesKirillov modelsRamanujan graphsharmonic cocyclesHecke operators File: Download FullPhDThesis.pdf Committee Members: Wen Ching Winnie Li, Committee Chair/Co-ChairWoodrow Dale Brownawell, Committee MemberYuri G Zarhin, Committee MemberMurat Gunaydin, Committee MemberNigel David Higson, Committee Member