IndisputableMonolith.Foundation.SimplicialLedger.EdgeLengthFromPsi
This module defines the log-potential assignment ε_i = ln ψ(σ_i) on vertices of the simplicial 3-complex. It supplies the discrete object that ContinuumBridge.laplacian_action and downstream Regge reductions rely on. Researchers closing the discrete-to-continuum gap in Recognition Science cite these definitions when moving from J-cost stationarity to the Einstein equations. The module consists entirely of supporting definitions and no top-level theorems.
claimThe log-potential is the map $\varepsilon : \mathrm{Fin}\, n \to \mathbb{R}$ given by $\varepsilon_i = \ln \psi(\sigma_i)$ on the vertices of the simplicial ledger; the associated edge-length field is obtained by the conformal ansatz $\ell_{ij} = \ell_0 \exp((\varepsilon_i + \varepsilon_j)/2)$.
background
The module belongs to the Foundation.SimplicialLedger hierarchy that replaces the cubic lattice with a coordinate-free simplicial 3-complex. Upstream, SimplicialLedger supplies the sheaf representation that unifies local and global J-cost variations, while ContinuumBridge proves that J-cost stationarity is equivalent to the Regge equations (up to the normalization $\kappa = 8\phi^5$). Constants fixes the RS time quantum $\tau_0 = 1$ tick.
The log-potential converts the psi field into edge-length data and is the identical object referenced by ContinuumBridge.laplacian_action. It therefore sits between the discrete ledger and the weak-field conformal reduction that appears in the gravity paper.
proof idea
this is a definition module, no proofs
why it matters in Recognition Science
The definitions feed the four-phase program that promotes the paper's Theorem 5.1 (field-curvature identity) to an unconditional Lean theorem. They are imported by ContinuumTheorem (Phase D), CubicDeficitDischarge (Phase A), SimplicialDeficitDischarge (Phase C5), CubicSimplicialEquivalence, NonlinearBridge, and WeakFieldConformalRegge. Without the log-potential the discrete-to-Regge step in the J-cost stationarity argument cannot be stated.
scope and limits
- Does not prove the continuum limit or the Einstein equations.
- Does not discharge any linearization hypotheses.
- Does not treat nonlinear regimes beyond the log-potential ansatz.
- Does not contain numerical checks or explicit examples.
used by (6)
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IndisputableMonolith.Foundation.SimplicialLedger.ContinuumTheorem -
IndisputableMonolith.Foundation.SimplicialLedger.CubicDeficitDischarge -
IndisputableMonolith.Foundation.SimplicialLedger.CubicSimplicialEquivalence -
IndisputableMonolith.Foundation.SimplicialLedger.NonlinearBridge -
IndisputableMonolith.Foundation.SimplicialLedger.SimplicialDeficitDischarge -
IndisputableMonolith.Gravity.WeakFieldConformalRegge
depends on (4)
declarations in this module (18)
-
theorem
is -
abbrev
LogPotential -
structure
EdgeLengthField -
def
conformal_edge_length_field -
theorem
conformal_edge_length_flat -
structure
HingeDatum -
structure
DeficitAngleFunctional -
def
regge_sum -
def
ReggeDeficitLinearizationHypothesis -
theorem
field_curvature_identity_under_linearization -
theorem
laplacian_action_flat -
theorem
regge_sum_flat_under_linearization -
def
logPotentialOf -
theorem
logPotentialOf_flat -
theorem
jcost_to_regge_factor_eq_kappa_einstein -
theorem
kappa_calibration_positive -
structure
EdgeLengthFromPsiCert -
theorem
edgeLengthFromPsiCert