Positioning on a PO in force 0
gr(f.n)
with:
This command enables to move to PO f.n while it reduces the proof force to 0 and keeps the saved proof commands unchanged.
From force 1, hypotheses of a proof obligation are all simplified during loading. This command will be useful if a proof obligation is such that raising its hypotheses makes the prover loop for a particular force (1,2, or 3).
Given the proof obligation whose command line is:
Force(3) & Next
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If the gr command is carried out
PRI> gr(Calculus.1)
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the command line will be put back in force 0:
Force(0) & Next
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