Revision history for entry Boolos, George; Putnam, Hilary (1968). "Degrees of unsolvability of constructible sets of integers" [BOODOU] |
| Time | Type | Notes |
Revision history for entry Boolos, George; Putnam, Hilary (1968). "Degrees of unsolvability of constructible sets of integers" [BOODOU] |
| Time | Type | Notes |