Parabolic BMO and global integrability of supersolutions to doubly   nonlinear parabolic equations
  We prove that local and global parabolic BMO spaces are equal thus extending the classical result of Reimann and Rychener. Moreover, we show that functions in parabolic BMO are exponentially integrable in a general class of space-time cylinders. As a corollary, we establish global integrability for positive supersolutions to a wide class of doubly nonlinear parabolic equations. 
Olli Saari
math.AP math.CA