2楼: Originally posted by xxdyt at 2013-05-30 11:19:16
BMO is the space of bounded mean oscillation, that is

\sup_{B}\frac1{B}  \int_B|u-u_B|<\infty

where u_B=\frac1{B}\int_B u.

VMO is the closure of compact support functions in BMO space.
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