KAM theory in momentum space and quasiperiodic Schrödinger operators
Kato decomposition of linear pencils
T. Kato [5] found an important property of semi-Fredholm pencils, now called the Kato decomposition. M. A. Kaashoek [3] introduced operators having the property P(S:k) as a generalization of semi-Fredholm operators. In this work, we study this class of operators. We show that it is characterized by a Kato-type decomposition. Other properties are also proved.
Kato-Protter type inequalities, bounded vectors and the exponential function
K-Groups of Toeplitz Algebras of Reinhardt Domains.
Konstruktion von Operatoren und Kernen mit Hilfe von Absorptionsmengen.
Korovkin sets and mean ergodic theorems.
Korovkin theory in liminal JB-algebras.
Kreǐn's trace formula and the spectral shift function.
Krengel-Lin decomposition for noncompact groups