A Formal Correspondence Between OMDoc with Alternative Proofs and the lambdaµµ-Calculus

We consider an extension of OMDoc proofs with alternative sub-proofs and proofs at different level of detail, and an affine non-deterministic fragment of the λµµ-calculus seen as a proof format. We provide explanations in pseudo-natural language of proofs in both formats, and a formal correspondence between the two by means of two mutually inverse encodings of one format in the other one.