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theorem proved tactic proof

realizedDefectCostBounded_of_charge_zero_and_excessBounded

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formal statement (Lean)

 270theorem realizedDefectCostBounded_of_charge_zero_and_excessBounded
 271    (fam : DefectSampledFamily)
 272    (hzero : fam.sensor.charge = 0)
 273    (hexcess : RealizedDefectAnnularExcessBounded fam) :
 274    RealizedDefectAnnularCostBounded fam := by

proof body

Tactic-mode proof.

 275  obtain ⟨K, hK⟩ := hexcess
 276  refine ⟨K, ?_⟩
 277  intro N
 278  have hfloor : annularTopologicalFloor N (fam.sensor.charge) = 0 := by
 279    rw [hzero, annularTopologicalFloor_zero]
 280  have hexN : annularExcess (fam.mesh N) ≤ K := hK N
 281  unfold annularExcess at hexN
 282  rw [fam.charge_spec N, hfloor] at hexN
 283  simpa using hexN
 284
 285/-- For a realized sampled family, bounded total cost is exactly the conjunction
 286of:
 2871. zero charge, and
 2882. bounded excess above the topological floor.
 289
 290This theorem isolates the remaining mathematical task cleanly: after the
 291realized-family refactor, the analytically natural target is no longer a bound
 292on arbitrary meshes, but a proof that the realized family has bounded excess
 293and hence can only occur with zero charge. -/

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