Summary
- options for process policy, notably for multiprocessor machines;
- tuned;
- tuned messages -- facilitate copy-paste;
- merged
- tuned;
- tuned proofs;
- Isar proof of Schroeder_Bernstein without using Hilbert_Choice (and metis);
- clarified lfp/gfp statements and proofs;
- repair LaTeX
- misc tuning for release;
- added lemma;