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Round-eight bit network dominates Jain.bitR8 moments

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IntMul.Kappa.R8.bitNetR8_mom

by Ethan Cheung Wang · Oct 21, 2026 · Mathlib 0df444a (Lean v4.33.1)

complexity-theoryinteger-multiplicationround-eightturing-machines

Round-eight bit network, moment-dominance form.

There exists a QH-network CCC over Z/2Z\mathbb{Z}/2\mathbb{Z}Z/2Z with Wb=104 719 230W_b = 104\,719\,230Wb​=104719230 roles and width mb=529m_b = 529mb​=529, together with a prime cutoff q0q_0q0​, such that:

  1. CCC runs correctly (RunsOK);
  2. for every prime q>q0q > q_0q>q0​ and every exponent fff, the edge and formal checks hold at the prime power qfq^fqf;
  3. for every exponent τ∈(0,1]\tau \in (0,1]τ∈(0,1], the child-width moment of CCC is at most that of Jain's round-eight bit histogram:
histMoment(C.hist, 529, τ)≤histMoment(hbit, 529, τ),\mathrm{histMoment}(C.\mathrm{hist},\,529,\,\tau)\le \mathrm{histMoment}(h^{\mathrm{bit}},\,529,\,\tau),histMoment(C.hist,529,τ)≤histMoment(hbit,529,τ),

where hbit=Jain.bitR8h^{\mathrm{bit}}=\mathrm{Jain.bitR8}hbit=Jain.bitR8 is the opposite-bank-order bit interchange of round eight (width classes up to 222222, a 484484484-class, and the 506506506–528528528 tail).

In the platform vocabulary this is exactly

Bit.BitNetMomStmtG 104719230 529 Jain.bitR8.\mathrm{Bit.BitNetMomStmtG}\,104719230\,529\,\mathrm{Jain.bitR8}.Bit.BitNetMomStmtG104719230529Jain.bitR8.

At the round-six constants (148225616,529,Jain.bitR6)(148225616,529,\mathrm{Jain.bitR6})(148225616,529,Jain.bitR6) the same predicate is Bit.BitNetR6MomStmt, already proved as IntMul.Kappa.R6.Bit.NB.bitNetR6_mom_exp.

This is the bit-network machine interface needed to feed Jain's round-eight histogram into the parametric assembly IntMul.Kappa.R6.kappa_finalG_at, and thence into IntMul.Kappa.jain_round8_framework.

Preamble
import Definitions.Def_IntMul_Kappa_RG_Defs
import Definitions.Def_IntMul_KappaJainData

set_option autoImplicit false
set_option relaxedAutoImplicit false
Formal statement
namespace IntMul.Kappa.R8

open IntMul.Kappa IntMul.Kappa.R6.Bit

/-- Round-eight bit interchange (opposite bank orders on the round-seven witness 2): a QH-network
over `ZMod 2` with $W = 104719230$ roles and width $m = 529$ whose child-width moments are
dominated by `Jain.bitR8`. -/
theorem bitNetR8_mom : BitNetMomStmtG 104719230 529 Jain.bitR8 := by
  sorry

end IntMul.Kappa.R8
Source
S. Jain, integer-mult-kappa, https://github.com/Swapnil-jain/integer-mult-kappa/tree/5868dc701a9bec375c9dc5391d992ab3b8c35f3f — README 'Round eight' (bit side: opposite bank orders on round-seven witness 2; W=104719230, m=529), lean/Round8.lean (bitHist), independent/round8-oppbank/; machine interface shape from Prove2me IntMul.Kappa.R6.Bit.BitNetMomStmtG (Def_IntMul_Kappa_RG_Defs) and the proved round-six instance IntMul.Kappa.R6.Bit.NB.bitNetR6_mom_exp; conditional on OpenAI Integer multiplication below n log n (23 Sep 2026) and Colkitt integer-mult-bounds

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