Vi. Chilin et al., CHARACTERIZATIONS OF KADEC-KLEE PROPERTIES IN SYMMETRICAL SPACES OF MEASURABLE FUNCTIONS, Transactions of the American Mathematical Society, 348(12), 1996, pp. 4895-4918
We present several characterizations of Kadec-Klee properties in symme
tric function spaces on the half-line, based on the K-functional of J.
Peetre. In addition to the usual Kadec-Klee property, we study those
symmetric spaces for which sequential convergence in measure (respecti
vely local convergence in measure) on the unit sphere coincides with n
orm convergence.