PERTURBATION OF POINT SPECTRA OF 2 × 2 UPPER TRIANGULAR OPERATOR MATRICES
HUANG Junjie, LI Chunguang, Alatancang
Journal of Systems Science and Mathematical Sciences ›› 2014, Vol. 34 ›› Issue (2) : 198-205.
PERTURBATION OF POINT SPECTRA OF 2 × 2 UPPER TRIANGULAR OPERATOR MATRICES
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