Browsing Proyecciones: Journal of Mathematics by Subject "Defect spectrum"
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Partition of the spectra for the lower triangular double band matrix as generalized difference operator Δv over the sequence spaces c and lp (1 < p < ∞)
Proyecciones (Antofagasta, On line); Vol 39 No 1 (2020); 51-71. -
Spectra and fine spectra for the upper triangular band matrix U(a0, a1, a2; b0, b1, b2) over the sequence space c0
Proyecciones. Journal of Mathematics; Vol 38 No 1 (2019); 145-162.