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.
Exact expanded first-order arithmetic statement
forall ab ac bb bc d ib ic. ~(d = 0) -> (forall mdr_i_signed_identity. (exists mdr_gap_signed_identitybound. mdr_gap_signed_identitybound + S (mdr_i_signed_identity) = (d)) -> (((exists ff_h_mdr_signed_identityentry. ff_h_mdr_signed_identityentry + S (mdr_i_signed_identity) = S ((S (mdr_i_signed_identity)) * ic)) /\ exists ff_q_mdr_signed_identityentry. ib = ff_q_mdr_signed_identityentry * S ((S (mdr_i_signed_identity)) * ic) + (mdr_i_signed_identity)))) -> (((forall mdr_i_identity_selected_signedpositive. (exists mdr_gap_identity_selected_signedpositivebound. mdr_gap_identity_selected_signedpositivebound + S (mdr_i_identity_selected_signedpositive) = ((d) * (d))) -> exists mdr_a_identity_selected_signedpositive. (((exists mdr_r_identity_selected_signedpositivepoint mdr_s_identity_selected_signedpositivepoint mdr_u_identity_selected_signedpositivepoint mdr_v_identity_selected_signedpositivepoint. ((mdr_i_identity_selected_signedpositive = (d) * mdr_r_identity_selected_signedpositivepoint + mdr_s_identity_selected_signedpositivepoint) /\ ((exists mdr_gap_identity_selected_signedpositivepointcolumn. mdr_gap_identity_selected_signedpositivepointcolumn + S (mdr_s_identity_selected_signedpositivepoint) = (d)) /\ ((((exists ff_h_mdr_identity_selected_signedpositivepointrow_index. ff_h_mdr_identity_selected_signedpositivepointrow_index + S (mdr_u_identity_selected_signedpositivepoint) = S ((S (mdr_r_identity_selected_signedpositivepoint)) * ic)) /\ exists ff_q_mdr_identity_selected_signedpositivepointrow_index. ib = ff_q_mdr_identity_selected_signedpositivepointrow_index * S ((S (mdr_r_identity_selected_signedpositivepoint)) * ic) + (mdr_u_identity_selected_signedpositivepoint))) /\ ((((exists ff_h_mdr_identity_selected_signedpositivepointcolumn_index. ff_h_mdr_identity_selected_signedpositivepointcolumn_index + S (mdr_v_identity_selected_signedpositivepoint) = S ((S (mdr_s_identity_selected_signedpositivepoint)) * ic)) /\ exists ff_q_mdr_identity_selected_signedpositivepointcolumn_index. ib = ff_q_mdr_identity_selected_signedpositivepointcolumn_index * S ((S (mdr_s_identity_selected_signedpositivepoint)) * ic) + (mdr_v_identity_selected_signedpositivepoint))) /\ (((exists ff_h_mdr_identity_selected_signedpositivepointsource. ff_h_mdr_identity_selected_signedpositivepointsource + S (mdr_a_identity_selected_signedpositive) = S ((S ((mdr_u_identity_selected_signedpositivepoint) * (d) + (mdr_v_identity_selected_signedpositivepoint))) * ac)) /\ exists ff_q_mdr_identity_selected_signedpositivepointsource. ab = ff_q_mdr_identity_selected_signedpositivepointsource * S ((S ((mdr_u_identity_selected_signedpositivepoint) * (d) + (mdr_v_identity_selected_signedpositivepoint))) * ac) + (mdr_a_identity_selected_signedpositive)))))))) /\ (((exists ff_h_mdr_identity_selected_signedpositiveoutput. ff_h_mdr_identity_selected_signedpositiveoutput + S (mdr_a_identity_selected_signedpositive) = S ((S (mdr_i_identity_selected_signedpositive)) * ac)) /\ exists ff_q_mdr_identity_selected_signedpositiveoutput. ab = ff_q_mdr_identity_selected_signedpositiveoutput * S ((S (mdr_i_identity_selected_signedpositive)) * ac) + (mdr_a_identity_selected_signedpositive)))))) /\ (forall mdr_i_identity_selected_signednegative. (exists mdr_gap_identity_selected_signednegativebound. mdr_gap_identity_selected_signednegativebound + S (mdr_i_identity_selected_signednegative) = ((d) * (d))) -> exists mdr_a_identity_selected_signednegative. (((exists mdr_r_identity_selected_signednegativepoint mdr_s_identity_selected_signednegativepoint mdr_u_identity_selected_signednegativepoint mdr_v_identity_selected_signednegativepoint. ((mdr_i_identity_selected_signednegative = (d) * mdr_r_identity_selected_signednegativepoint + mdr_s_identity_selected_signednegativepoint) /\ ((exists mdr_gap_identity_selected_signednegativepointcolumn. mdr_gap_identity_selected_signednegativepointcolumn + S (mdr_s_identity_selected_signednegativepoint) = (d)) /\ ((((exists ff_h_mdr_identity_selected_signednegativepointrow_index. ff_h_mdr_identity_selected_signednegativepointrow_index + S (mdr_u_identity_selected_signednegativepoint) = S ((S (mdr_r_identity_selected_signednegativepoint)) * ic)) /\ exists ff_q_mdr_identity_selected_signednegativepointrow_index. ib = ff_q_mdr_identity_selected_signednegativepointrow_index * S ((S (mdr_r_identity_selected_signednegativepoint)) * ic) + (mdr_u_identity_selected_signednegativepoint))) /\ ((((exists ff_h_mdr_identity_selected_signednegativepointcolumn_index. ff_h_mdr_identity_selected_signednegativepointcolumn_index + S (mdr_v_identity_selected_signednegativepoint) = S ((S (mdr_s_identity_selected_signednegativepoint)) * ic)) /\ exists ff_q_mdr_identity_selected_signednegativepointcolumn_index. ib = ff_q_mdr_identity_selected_signednegativepointcolumn_index * S ((S (mdr_s_identity_selected_signednegativepoint)) * ic) + (mdr_v_identity_selected_signednegativepoint))) /\ (((exists ff_h_mdr_identity_selected_signednegativepointsource. ff_h_mdr_identity_selected_signednegativepointsource + S (mdr_a_identity_selected_signednegative) = S ((S ((mdr_u_identity_selected_signednegativepoint) * (d) + (mdr_v_identity_selected_signednegativepoint))) * bc)) /\ exists ff_q_mdr_identity_selected_signednegativepointsource. bb = ff_q_mdr_identity_selected_signednegativepointsource * S ((S ((mdr_u_identity_selected_signednegativepoint) * (d) + (mdr_v_identity_selected_signednegativepoint))) * bc) + (mdr_a_identity_selected_signednegative)))))))) /\ (((exists ff_h_mdr_identity_selected_signednegativeoutput. ff_h_mdr_identity_selected_signednegativeoutput + S (mdr_a_identity_selected_signednegative) = S ((S (mdr_i_identity_selected_signednegative)) * bc)) /\ exists ff_q_mdr_identity_selected_signednegativeoutput. bb = ff_q_mdr_identity_selected_signednegativeoutput * S ((S (mdr_i_identity_selected_signednegative)) * bc) + (mdr_a_identity_selected_signednegative))))))))Constructive proof overview
Generated structural guide
The actual identity-selected signed submatrix is the original signed square matrix in both component codes.
The unchanged tactic script uses 1 declared prerequisite and contains 26 exact native proof lines.
Alpha v34 checked-use · first admitted v27 · independently kernel and Lean verified; not Stable
Proof neighborhood
Direct dependencies
Direct dependents
Formal native tactic body
Dependencies are introduced as named hypotheses before line 1. Local theorem links identify exact declared prerequisites. This exact body belongs to a complete independently kernel-checked constructive proof bundle and has Alpha checked-use authority; it does not imply Stable membership.
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.
Named ingredients (1)
01Fix variables and assumptionsL1–9
02Separate the logical casesL10–10
Follow the explicit conjunction, disjunction, witness, or contradiction step recorded below.
- L10
split
03Use earlier factsL11–20
Instantiate or apply named facts and discharge the corresponding proof obligations.
- L11
specialize matrix_lattice_identity_selected_natural (ab) - L12
specialize matrix_lattice_identity_selected_natural (ac) - L13
specialize matrix_lattice_identity_selected_natural (d) - L14
specialize matrix_lattice_identity_selected_natural (ib) - L15
specialize matrix_lattice_identity_selected_natural (ic) - L16
apply matrix_lattice_identity_selected_natural - L17
exact hd - L18
exact hidentity - L19
specialize matrix_lattice_identity_selected_natural (bb) - L20
specialize matrix_lattice_identity_selected_natural (bc)
04Use earlier factsL21–26
Instantiate or apply named facts and discharge the corresponding proof obligations.
Original exact command ledger · 26 lines
- 0001
intro ab - 0002
intro ac - 0003
intro bb - 0004
intro bc - 0005
intro d - 0006
intro ib - 0007
intro ic - 0008
intro hd - 0009
intro hidentity - 0010
split - 0011
specialize matrix_lattice_identity_selected_natural (ab) - 0012
specialize matrix_lattice_identity_selected_natural (ac) - 0013
specialize matrix_lattice_identity_selected_natural (d) - 0014
specialize matrix_lattice_identity_selected_natural (ib) - 0015
specialize matrix_lattice_identity_selected_natural (ic) - 0016
apply matrix_lattice_identity_selected_natural - 0017
exact hd - 0018
exact hidentity - 0019
specialize matrix_lattice_identity_selected_natural (bb) - 0020
specialize matrix_lattice_identity_selected_natural (bc) - 0021
specialize matrix_lattice_identity_selected_natural (d) - 0022
specialize matrix_lattice_identity_selected_natural (ib) - 0023
specialize matrix_lattice_identity_selected_natural (ic) - 0024
apply matrix_lattice_identity_selected_natural - 0025
exact hd - 0026
exact hidentity