Proof equivalence in MLL is PSPACE-complete

@article{Heijltjes2016ProofEI,
  title={Proof equivalence in MLL is PSPACE-complete},
  author={Willem Heijltjes and Robin Houston},
  journal={Log. Methods Comput. Sci.},
  year={2016},
  volume={12}
}
MLL proof equivalence is the problem of deciding whether two proofs in multiplicative linear logic are related by a series of inference permutations. It is also known as the word problem for star-autonomous categories. Previous work has shown the problem to be equivalent to a rewiring problem on proof nets, which are not canonical for full MLL due to the presence of the two units. Drawing from recent work on reconfiguration problems, in this paper it is shown that MLL proof equivalence is… Expand
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