TY - JOUR
T1 - The space JNp
T2 - Nontriviality and duality
AU - Dafni, Galia
AU - Hytönen, Tuomas
AU - Korte, Riikka
AU - Yue, Hong
PY - 2018/8/1
Y1 - 2018/8/1
N2 - We study a function space JNp based on a condition introduced by John and Nirenberg as a variant of BMO. It is known that Lp⊂JNp⊊Lp,∞, but otherwise the structure of JNp is largely a mystery. Our first main result is the construction of a function that belongs to JNp but not Lp, showing that the two spaces are not the same. Nevertheless, we prove that for monotone functions, the classes JNp and Lp do coincide. Our second main result describes JNp as the dual of a new Hardy kind of space HKp′ .
AB - We study a function space JNp based on a condition introduced by John and Nirenberg as a variant of BMO. It is known that Lp⊂JNp⊊Lp,∞, but otherwise the structure of JNp is largely a mystery. Our first main result is the construction of a function that belongs to JNp but not Lp, showing that the two spaces are not the same. Nevertheless, we prove that for monotone functions, the classes JNp and Lp do coincide. Our second main result describes JNp as the dual of a new Hardy kind of space HKp′ .
KW - Atomic decomposition
KW - Bounded mean oscillation
KW - Duality
KW - John–Nirenberg inequality
KW - SELF-IMPROVING PROPERTIES
KW - BOUNDED MEAN-OSCILLATION
KW - BMO-TYPE NORMS
KW - JOHN-NIRENBERG
KW - POINCARE INEQUALITIES
KW - PERIMETER
KW - SETS
UR - http://www.scopus.com/inward/record.url?scp=85047228658&partnerID=8YFLogxK
U2 - 10.1016/j.jfa.2018.05.007
DO - 10.1016/j.jfa.2018.05.007
M3 - Article
AN - SCOPUS:85047228658
SN - 0022-1236
VL - 275
SP - 577
EP - 603
JO - Journal of Functional Analysis
JF - Journal of Functional Analysis
IS - 3
ER -