Operators and Matrices · Volume 12, Issue 2 Hypercyclicity and Weyl type theorems for operator matrices 12-21 Pages 321-332 DOI 10.7153/oam-2018-12-21 Downloads Short PDF Full PDF PNG Authors Il Ju An Jaeseong Heo Keywords 2 × 2 operator matrices Browder essential approximate point spectrum Weyl's theorem a a Subject classes 47A53 47A55 47A10