Types of tightness in spaces with unconditional basis
Tom 220 / 2014
Studia Mathematica 220 (2014), 243-264
MSC: Primary 46B03.
DOI: 10.4064/sm220-3-3
Streszczenie
We present a reflexive Banach space with an unconditional basis which is quasi-minimal and tight by range, i.e. of type (4) in Ferenczi–Rosendal's list related to Gowers' classification program of Banach spaces, but in contrast to the recently constructed space of type (4), our space is also tight with constants, thus essentially extending the list of known examples in Gowers' program. The space is defined on the basis of a boundedly modified mixed Tsirelson space with the use of a special coding function.
