TY - CHAP
T1 - Lifting in fractional Sobolev spaces and in VMO
AU - Brezis, Haïm
AU - Mironescu, Petru
N1 - Publisher Copyright:
© 2021, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2021
Y1 - 2021
N2 - This chapter is a follow-up to Chapter 1. We consider again maps u: Ω→ S1, with Ω⊂ RN, N≥ 1, smooth bounded simply connected, and our goal is to find a lifting φ “as smooth as u permits.” The difference with Chapter 1 is that u belongs either to a fractional Sobolev space Ws , p (whose definition is recalled in Section 5.1), or to the space VMO (functions of vanishing mean oscillation, whose definition is recalled in Section 5.2.1 below).
AB - This chapter is a follow-up to Chapter 1. We consider again maps u: Ω→ S1, with Ω⊂ RN, N≥ 1, smooth bounded simply connected, and our goal is to find a lifting φ “as smooth as u permits.” The difference with Chapter 1 is that u belongs either to a fractional Sobolev space Ws , p (whose definition is recalled in Section 5.1), or to the space VMO (functions of vanishing mean oscillation, whose definition is recalled in Section 5.2.1 below).
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U2 - 10.1007/978-1-0716-1512-6_5
DO - 10.1007/978-1-0716-1512-6_5
M3 - Chapter
AN - SCOPUS:85122484686
T3 - Progress in Nonlinear Differential Equations and Their Application
SP - 205
EP - 226
BT - Progress in Nonlinear Differential Equations and Their Application
PB - Birkhauser
ER -