Current library: Alpha v34, 4,223 checked-use theorems; Stable remains 432. Historical first admissions, original proof editions, and non-admitted aliases are preserved.
These are actual signed-table and finite-sum foundations. Equality compares represented signed values, not arbitrary encodings. MatrixMinorFourCode is reused solely as generic nested pairing, without a matrix hypothesis. Full finite signed G007 is established separately in the Möbius-inversion family.
Exact theorem in conservative defined notation
∀ F. ∀ pb. ∀ pc. ∀ nb. ∀ nc. ∀ l. ∀ p. ∀ n. ∀ z. MatrixMinorFourCode(F,pb,pc,nb,nc) → Sum(pb,pc,l,p) → Sum(nb,nc,l,n) → SignedBalance(z,p,n) → SignedPrefixSum(F,l,z)
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 assumptionsL11–13
03Construct an explicit witnessL14–19
04Separate the logical casesL20–20
Follow the explicit conjunction, disjunction, witness, or contradiction step recorded below.
- L20
split
05Use earlier factsL21–21
Instantiate or apply named facts and discharge the corresponding proof obligations.
- L21
exact hrep
06Separate the logical casesL22–22
Follow the explicit conjunction, disjunction, witness, or contradiction step recorded below.
- L22
split
07Use earlier factsL23–23
Instantiate or apply named facts and discharge the corresponding proof obligations.
- L23
exact hp
08Separate the logical casesL24–24
Follow the explicit conjunction, disjunction, witness, or contradiction step recorded below.
- L24
split
Original defined command ledger · 26 lines
- 0001
intro F - 0002
intro pb - 0003
intro pc - 0004
intro nb - 0005
intro nc - 0006
intro l - 0007
intro p - 0008
intro n - 0009
intro z - 0010
intro hrep - 0011
intro hp - 0012
intro hn - 0013
intro hz - 0014
exists pb - 0015
exists pc - 0016
exists nb - 0017
exists nc - 0018
exists p - 0019
exists n - 0020
split - 0021
exact hrep - 0022
split - 0023
exact hp - 0024
split - 0025
exact hn - 0026
exact hz