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.
This branch proves the finite determinant/rank/span substrate. It does not claim Smith or Hermite normal form, lattice index equals determinant, determinant multiplicativity, lattice reduction, or geometry-of-numbers theorems.
Exact theorem in conservative defined notation
∀ b. ∀ c. ∀ u. ∀ v. ∀ l. ∀ i. ∀ d. ∀ pb. ∀ pc. ∀ nb. ∀ nc. ∀ p. ∀ n. (∀ x. ∀ y. Lt(x,l) → BetaAt(b,c,x,y) → BetaAt(u,v,x,y)) → Lt(i,l) → SignedDeterminantNodeAt(b,c,i,d,pb,pc,nb,nc,p,n) → SignedDeterminantNodeAt(u,v,i,d,pb,pc,nb,nc,p,n)
Every linked abbreviation expands hygienically to the identical original native formula.
Definition DAG
Actual proof prerequisites
Complete tactic proof in conservative notation
All 26 original proof lines are preserved. Only local proposition formulas are abbreviated; every abbreviation has an exact binder-safe expansion check. The linked exact edition contains the unchanged replay script.
Read the argument
Proof checkpoints
This is a reading aid, not a new proof or a proof-tree certificate. Checkpoint groups are consecutive commands, not inferred branch boundaries. Every step links to the preserved script.
01Fix variables and assumptionsL1–10
02Fix variables and assumptionsL11–16
03Separate the logical casesL17–18
04Construct an explicit witnessL19–19
Supply the displayed value, then prove that it has the required property.
- L19
exists x
05Separate the logical casesL20–20
Follow the explicit conjunction, disjunction, witness, or contradiction step recorded below.
- L20
split
Original defined command ledger · 26 lines
- 0001
intro b - 0002
intro c - 0003
intro u - 0004
intro v - 0005
intro l - 0006
intro i - 0007
intro d - 0008
intro pb - 0009
intro pc - 0010
intro nb - 0011
intro nc - 0012
intro p - 0013
intro n - 0014
intro hprefix - 0015
intro hi - 0016
intro hrecord - 0017
cases hrecord - 0018
cases hrecord_witness - 0019
exists x - 0020
split - 0021
exact hrecord_witness_left - 0022
specialize hprefix (i) - 0023
specialize hprefix (x) - 0024
apply hprefix - 0025
exact hi - 0026
exact hrecord_witness_right