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def definition def or abbrev

extinctionCascadeCert

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formal statement (Lean)

 241def extinctionCascadeCert : ExtinctionCascadeCert where
 242  Z_life_pos := Z_life_pos

proof body

Definition body.

 243  Z_life_gt_one := Z_life_gt_one
 244  totalRung_pos := fun _ E L j => totalRung_pos E L j
 245  isBankrupt_antimono := fun _ E L₁ L₂ h j => isBankrupt_antimono E L₁ L₂ h j
 246  cascadeStep_subset := fun _ E L => cascadeStep_subset E L
 247  cascadeStep_card_le := fun _ E L => cascadeStep_card_le E L
 248  cascadeIterate_subset := fun _ E L k => cascadeIterate_subset E L k
 249  cascadeIterate_card_monotone :=
 250    fun _ E L k => cascadeIterate_card_monotone E L k
 251  recoveryTime_pos := recoveryTime_pos
 252  recoveryTime_strict_mono := recoveryTime_strict_mono
 253  deep_cascade_recovery_lower := deep_cascade_recovery_lower
 254
 255/-- **EXTINCTION CASCADE ONE-STATEMENT.** A species goes extinct when
 256its total rung falls below `Z_life = φ^19`. The cascade closure on a
 257finite species ecosystem is monotone (each step weakly shrinks the
 258live set, and bankruptcy is preserved under support-removal). The
 259cascade terminates in at most `n` steps on a finite ecosystem of `n`
 260species. Post-cascade recovery time scales as `φ^k` in cascade depth,
 261unbounded above. -/

depends on (38)

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