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Raw machine bound for deadlines not exceeding the job count

Proved
OAI.ThreeMachine.StackCompiler.requestRawBound_length

by wurtle · Nov 4, 2026 · Mathlib 0df444a (Lean v4.33.1)

complexityschedulingthree-machine

Throughout, a routine R : Uniform f is a program in the compiler's while-language Code, with a charge function, that computes the function family fif_ifi​ on encoded data. R.time i x is the charge of RRR on the encoding of xxx, a natural number that bounds the number of evaluation steps of the program on that input. For s,f:I→Ns,f:I\to\mathbb{N}s,f:I→N, the predicate Poly s f d means that there is a constant CCC with f(i)≤C (s(i)+2)df(i)\le C\,(s(i)+2)^df(i)≤C(s(i)+2)d for all i∈Ii\in Ii∈I. Let SmallDeadline be the type of requests whose deadline is either absent or at most the number of jobs. For xxx in this type, let LLL be the length of the bit encoding RequestData.bits of the request. Then the raw time bound for the compiled machine, requestRawBound x =2000 (time+L+∣out∣+1)=2000\,(\mathrm{time}+L+|\mathrm{out}|+1)=2000(time+L+∣out∣+1), with time the running time of Uniform.requestAnswer on the request and out the bit list Algorithm.output of the request, satisfies Poly of degree 150020150020150020 in LLL.

Formalization Note The statement is reproduced verbatim from upstream Main.lean (openai/math, Apache-2.0, credit OpenAI). It is derived from requestRawBound_poly and gives the running-time bound used in main_theorem.

Preamble
import Mathlib
import Definitions.Def_OAIThreeMachineSched02

set_option maxHeartbeats 2000000
set_option maxRecDepth 100000
set_option linter.all false
set_option Elab.async false

namespace OAI

section
namespace ThreeMachine.StackCompiler

Formal statement
theorem requestRawBound_length : Poly (fun x : SmallDeadline => (RequestData.bits x.1).length)
    (fun x => requestRawBound x.1) 150020 := by
  sorry

end ThreeMachine.StackCompiler
end
end OAI
Source
OpenAI, "A Polynomial-Time Algorithm for Three-Machine Unit-Job Scheduling" (September 24, 2026), openai/math, cost bounds of the stack compiler. Lean: https://github.com/openai/math/blob/adc7f1241b42e322a6451854ab7e4b4c146bf78a/lean/OAI/Computability/Scheduling/Main.lean#L46

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