The structure of differential invariants and differential cut elimination

@TECHREPORT{Platzer11:diffcut,
	ref = {DBLP:journals/lmcs/Platzer12},

  author    = {Andr{\'e} Platzer},
  title     = {The Structure of Differential Invariants and
               Differential Cut Elimination},
  number    = {CMU-CS-11-112},
  year      = {2011},
  month     = {},
  institution = {School of Computer Science,
               Carnegie Mellon University},
  address   = {Pittsburgh, PA},
  pdf = {http://reports-archive.adm.cs.cmu.edu/anon/2011/CMU-CS-11-112.pdf}
}```