Current library: Alpha v34, 4,223 checked-use theorems; Stable remains 432. Historical first admissions, original proof editions, and non-admitted aliases are preserved. Exact original first-admission records.
Hygienic expanded first-order definition
exists ff_predecessor_ptmf_milestone. (c = S ff_predecessor_ptmf_milestone /\ n = 4 * ff_predecessor_ptmf_milestone + 3)The unchanged native kernel never receives this surface symbol. Binder-safe expansion produces only its existing first-order syntax.
Direct definition dependencies
Definitions depending on this notation
none
Checked theorems using this definition
none directly; see definition consumers