Qualitative spatial representation and reasoning with the region connection calculus.
We can show that in our calculus programs can be reduced to values that are pure terms.
Furthermore, the typing of ensures that only well-typed syntactic expressions can be represented in the calculus.
The sequent calculus we consider just has implication, no structural rules and a changed axiom.
The latter is a sequent calculus that needs none of the standard structural rules of weakening, contraction or cut.
In their analysis, they used motor calculus and the concept of virtual work coefficient.
Because of this extension, the naive adaptation of labelled bisimulations from the pi calculus is too strong to be useful for the purposes of verification.
A weak head reduction relation is defined for the expressions of the calculus.
