Proof of `A Set of Jobs Is Feasible Exactly When It Satisfies Both Conditions` (3rd statement)
What this proof establishes
no assumptions
Assuming the claims on the left, the claim on the right holds — checked by the archive's pipeline. Proof code is not displayed here.
Description
The interval colouring argument: a set of intervals of depth at most is -colourable, by colouring in order of left endpoint and reusing the colour of an interval that has already ended.