Heat Trace of non-local operators
  This paper extends results of M. van den Berg on two-term asymptotics for the trace of Sch\"odinger operators when the Laplacian is replaced by non-local (integral) operators corresponding to rotationally symmetric stable processes and other closely related L\'evy processes. 
Rodrigo Ba\~nuelos and Selma Y{\i}ld{\i}r{\i}m Yolcu
math.SP math.PR