Explain the Lean structure `GravitationalWaveCert` in module `IndisputableMonolith.Astrophysics.GravitationalWaveFromJCost`. Write for an educated reader who knows science and programming but may not know Lean. Cover: (1) what the declaration says in plain English, (2) why it matters in Recognition Science, (3) how to read the formal statement, (4) visible dependencies or certificates in the supplied source, and (5) what this declaration does not prove. Cite only declarations present in the supplied Recognition source.

The supplied Lean source slice does not contain the module IndisputableMonolith.Astrophysics.GravitationalWaveFromJCost or the declaration GravitationalWaveCert. Therefore, I cannot address your specific points regarding (1) what the declaration says in plain English, (3) how to read its formal statement, (4) its visible dependencies, or (5) what it does not prove.

I can, however, explain (2) the foundational context for gravitational waves in Recognition Science using the provided canon slice.

Gravitational Propagation in RS

In Recognition Science, there is no separate "gravitational medium" with independent properties. Both light and gravity propagate on the exact same discrete ledger substrate. Because they share the same fundamental atomic time quantum (tick) and causal spatial step (voxel), they are subject to identical speed bounds.

• Light Speed: Defined natively as 1 voxel per tick (c_RS).
• Gravity Speed: Defined identically as 1 voxel per tick (c_grav_RS).
• Speed Equality: The THEOREM c_grav_eq_c_RS derives that these propagation speeds are structurally identical. This strictly enforces the ratio $c_{\text{grav}} / c = 1$ (speed_ratio_unity).

While GravitationalWaveCert itself is omitted from this slice, any RS certification of gravitational waves builds upon this rigorous mathematical equality, matching the empirical observation from GW170817 that gravity and light travel at the same speed.