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feat(lean4): add formal verification specs for ensemble models

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Lean 4 formalization of the decision tree + MLP ensemble architecture.
Axiomatizes Float properties (sigmoid bounds, ReLU nonnegativity) since
Lean's Float ops are extern-backed. Proves MLP output is bounded in (0,1)
and ensemble output is always a valid decision. No mathlib dependency.

Signed-off-by: Sienna Meridian Satterwhite <sienna@sunbeam.pt>
This commit is contained in:
Sienna Meridian Satterwhite
2026-03-10 23:38:21 +00:00
parent 5daed3ecb0
commit 982cf5755d
12 changed files with 314 additions and 0 deletions
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