Paper Step 4(A): structural two-half endpoint splice #
This file records two facts used when the four external Fourier variables are integrated only after the signed within-half removals.
- On a residual half, the exceptional incoming block and an exceptional outgoing block cannot be the same analytic step. If they were, that step would span the whole current carrier and, being the last step, would leave no final single. Thus the same-block case belongs to the full/full Step-1 branch.
- When both endpoints of both residual halves are direct, the genuine terminal density factors exactly through four translated Green modes. The displayed norm identity is taken only after this signed four-endpoint identity; the complete cross-covariance core is never split.
The one-endpoint ordinary-to-inserted integral bridge #
Integrated form of the paper's one exceptional-endpoint sacrifice.
This lemma is deliberately applied only after the corresponding signed
endpoint identity has been completed. It turns the ordinary primitive
majorant produced by that identity into the inserted majorant, charging
exactly the single eps^-2 cost prescribed in Step 4(A).
The retained outgoing terminal, jointly in its endpoint variables #
Regroup the free outgoing variable, the retained primitive tuple, and
the post-terminal carrier in the paper order
(y,(t,v)) ↦ (v,(t,y)).
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The endpoint/primitive/post regroup preserves the corresponding product measures.
The signed post-terminal density after the retained primitive tuple and outgoing Fourier variable have both been evaluated.
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Joint stop-carrier form of the retained outgoing operation. This is the consumer used after an exceptional incoming endpoint has already been collapsed and transported to the stop immediately before the distinct outgoing terminal.
View the canonical endpoint-terminal geometry as the arbitrary-prefix terminal package used by the exact outgoing Fourier calculation.
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- data.paperOutgoingTerminal = { terminalData := data.terminalData, endpoint := data.transport }
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After the retained outgoing head is removed, its erased outer factor
is exactly the completed post-terminal chain with both genuine boundary
slots deleted. This is the pointwise seam needed to Fourier-integrate a
direct incoming Green leg after the outgoing ordinary-J operation.
Exact joint outgoing-endpoint operation, starting at the initial residual half. The proper prefix is transported while the expression is still signed; the terminal primitive tuple and the outgoing endpoint are then regrouped and integrated in the paper order. The norm is nowhere taken.
The signed density exposed after the retained outgoing primitive tuple and external endpoint have both been integrated.
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Quantitative form of the local outgoing endpoint operation. The norm is taken only after the ordinary primitive phase defect has been formed; the retained terminal is then charged by its transported edge certificate.
Parameter-carrier form of the retained outgoing endpoint operation.
An already completed opposite half may be carried in U; the terminal
tuple and endpoint are still integrated sectionwise before the parameter
integral and before any norm.
Exact root regrouping for a direct outgoing endpoint #
Exact, signed version of the outgoing-endpoint regroup used in paper Step 4(A). The free outgoing variable is moved next to the completed half, its Green leg is Fourier-integrated, and the untouched opposite half and cross-covariance factor stay inside the outer integral. In particular, there is no triangle inequality in this statement.
The same terminal regrouping with one arbitrary untouched carrier.
Move the outgoing endpoint next to the terminal coordinates while leaving one arbitrary parameter carrier outside.
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The one-parameter terminal regroup preserves product measure.
Parameterized joint stop-carrier form of the retained outgoing operation. The untouched carrier is placed outside only after the signed endpoint integrand has been formed. This is the exact Fubini seam needed when the opposite half has already been collapsed by the exceptional incoming operation.
Certificate-ready bound for the generic retained outgoing defect. The exact ordinary primitive phase defect has already been formed, so this is the first point where its norm is taken.
Integrating the remaining predecessor endpoint preserves the outgoing
Fourier decay and costs exactly the L¹ mass of that certified named edge.
The triangle inequality is used only after the complete signed terminal
defect has been formed.
The same completed terminal estimate in the budget's inserted-kernel
currency. Exactly one exceptional endpoint sacrifice is introduced; no
cost is charged to the direct incoming endpoint carried by coefficient.
One-parameter form of the exact direct-outgoing Fourier regroup. This is the form used when the untouched parameter is the already-completed opposite half.
Joint integrability survives the exact direct-outgoing Fourier evaluation. This is the Fubini license needed to hand a completed first half to the second half; it is derived from the same pre-Fourier joint integrability, not assumed independently.
Reindex the completed left endpoint carrier as the untouched parameter
of the right initial source: (((z,w),v),u) ↦ ((z,(w,u)),v).
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The paired-incoming/retained-outgoing endpoint coefficient #
The coefficient left after the paired incoming operation, with the free outgoing character removed. The remaining parameter consists of the two opposite-half external variables and its still-signed residual carrier. This is an exact signed object; the ordinary primitive defects at both endpoints are estimated only after the outgoing operation.
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The original endpoint-stop coefficient factors as the free outgoing character times the reduced coefficient. This is precisely the algebraic seam required before the retained outgoing Fourier integration.
Pointwise density form of the preceding coefficient factorization. The outgoing character is pulled out by linearity, while the signed stop density itself is left untouched.
Removing the retained outgoing terminal does not change the cross-cut primitive factor: that factor is indexed only by residual singles, hence only by coordinates surviving in the post-terminal carrier.
The post-terminal coefficient used by the retained outgoing theorem. Its only left-half coordinates are the residual singles surviving after the terminal block; the terminal primitive tuple is absent by definition.
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The reduced stop coefficient factors literally through the post-terminal projection used by the outgoing primitive split.
Exact paired-incoming/retained-outgoing splice at the genuine refined
root. The incoming exceptional head and every proper-prefix interval are
removed first. The root parameters are then only reassociated, and the
retained terminal's primitive tuple and outgoing endpoint are integrated
by the paper's ordinary-J operation. No norm occurs in this theorem.
The right-half cross-factor projection #
The pre-existing exceptional-stop projection theorem is stated for the first half of the doubled carrier. The paper uses the same operation on the second half after the first half has already been reduced. The next two lemmas are the literal right-half mirror and its composition with the complete after-head alternating transport. They are signed coordinate identities; no estimate is made here.
Projecting the right initial tuple through its exceptional incoming stop and discarding the retained head does not change the cross-cut primitive factor. The already-completed left half is untouched.
The same right-half cross factor may be read on the terminal carrier of the complete after-head alternating transport.
The initial-source Fubini license propagates to the certified exceptional stop. This is the integrability subproof already present in the trace/Fourier bridge, exposed here so the second half of the paper splice does not carry a redundant hypothesis.
The complete signed left-half splice in the incoming-exceptional/outgoing-direct case. The exceptional incoming head and every later left-half interval are removed exactly by the alternating transport. Only then is the free outgoing variable regrouped and Fourier-integrated. The right half and the entire cross-covariance factor remain signed inside the displayed outer integral.
Generic signed two-endpoint splice for one half. It is the reusable
paper Step-4(A) operation needed on the right copy: first transport the
all-Green initial half to its exceptional incoming head, then collapse that
head and every later half-block, and finally Fourier-integrate a direct
outgoing Green leg. All parameters in ZW and VR remain untouched.
Single-parameter form of the complete exceptional-incoming/direct- outgoing half splice. Its untouched parameter will be the terminal coordinate of the opposite half, so no dummy product carrier is needed in the two-half paper assembly.
Pointwise splice of the two exceptional-incoming/direct-outgoing halves #
The untouched coefficient carried from the completed left half while the right exceptional incoming endpoint is processed. It contains the left incoming defect, both exact left boundary coefficients, and the still-signed cross-cut primitive product on the two terminal carriers.
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The signed integrand left by the completed left half is literally the right half's exceptional-incoming initial source after projecting the cross factor through the right trace. This is the paper's two-half splice before the right endpoint integrations and before any norm.
The completed left-half integrand is jointly integrable in the two right boundary variables, the right initial carrier, and the left terminal carrier. This is obtained by marginalizing the left outgoing Fourier variable from the already available driver-terminal joint integrability.
A terminal half with both boundary Green legs direct has an integrable
two-endpoint Fourier coefficient after the outgoing variable is evaluated.
The proof is the terminal-certificate L1 theorem followed by the exact
Fourier identity, so it introduces no majorant into the signed chain.
Terminal joint integrability for the two-half
exceptional-incoming/direct-outgoing splice. A certificate gives L1 for
each completed half-chain; the cross primitive factor is bounded and
measurable. Hence the only remaining factors are unimodular characters
and constant primitive defects.
Regrouping the completed left half produces exactly the right half's exceptional initial source, and transports integrability with it.
Exact two-half paper splice when both incoming endpoints are paired
exceptional heads and both outgoing endpoints are direct Green legs. The
left half is removed first, its terminal coordinate becomes an untouched
parameter of the right trace, and the right half is then removed with
modes -alpha,-beta. No norm occurs in the statement or proof.
The actual refined-root endpoint cases #
At positive order, the four entries of the canonical endpoint pattern
are exactly the four tests appearing in paper Step 4(A): survival of the
incoming internal vertex, and absence of an extracted outgoing chain edge,
on the left and right halves respectively. Thus directFourier means that
the external Green leg is integrated directly; its complementary case is
the ordinary-J sacrifice.
This is a definitional classification only. It contains no estimate and, in particular, introduces no modulus before the signed removals.
The actual refined schedule has precisely the paper's branch split: either every contraction in the fibre is full/full (Step 1), or the representative has a residual single and each of its four external endpoints is one of the two Step-4(A) cases. The latter is recorded through the canonical case pattern, so downstream code can eliminate the sixteen combinations without inventing a separate routing interface.
A full within-half pairing necessarily removes the outgoing chain edge.
This is the right-endpoint half of the fact that every external endpoint is
in the ordinary-J branch of paper Step 1.
In the full/full branch every one of the four external endpoints is an
insertedSacrifice endpoint. This is exactly paper Step 1: both copies are
exhausted by fully paired intervals, so neither incoming vertex survives and
both outgoing chain edges are removed.
Consequently the full/full branch spends exactly the four ordinary-J
sacrifices, namely epsilon^{-8}. This is the scalar endpoint ledger that
will be multiplied only after the two signed Step-1 halves are assembled.
The residual incoming/outgoing exceptional blocks are distinct #
If a half has a residual single, its block beginning at the first
internal vertex cannot also be the terminal block ending at the last
internal vertex. Equality would make the terminal block the entire active
carrier, so completing the schedule would leave finalActive = empty.
Exact direct/direct splice of the two completed halves #
After all signed within-half removals, four direct external legs give the literal product of their four translated Green modes and the still grouped endpoint-erased residual core.
The first norm in the four-direct branch is taken after all four exact
Fourier integrations. Its multiplier is precisely
<alpha>^-4 <beta>^-4.
Actual refined root, with all four direct endpoints #
Exact signed collapse from the genuine refined physical root to the endpoint-integrated nested carrier. This is the physical-integral form of the Steps 2--3 identity; no norm is introduced by the adapter.
In the four-direct residual branch, the genuine refined root has the
paper's ⟨α⟩⁻⁴⟨β⟩⁻⁴ factor before any absolute-value estimate is made on
the complete endpoint-erased core.
The four-direct core in complete-run currency #
The inverse-square model kernel has strictly positive total mass. This small fact lets the public grouped-to-complete-run identity be cancelled down to its endpoint-erased core, instead of duplicating its coordinate-reindexing proof.
Pointwise four-direct endpoint estimate with only the two endpoint-erased terminal paths majorized.
The four external Green legs have already been Fourier-integrated in
norm_endpointIntegratedResidualDensity_eq_of_four_direct, so their exact
fourth-order mode weights stay outside. The only subsequent inequalities
are the two terminal certificate bounds and the nonnegativity of the still
grouped residual primitive sum. This is the paper-order input for the
complete nested run: no external endpoint scale or inverse-square mass is
introduced.
The positive terminal core remaining after four direct Fourier
integrations. In contrast to endpointIntegratedGroupedMajorant, the two
external scales and four inverse-square endpoint masses are absent.
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Almost-everywhere terminal-product form of the preceding four-direct estimate. This is the exact boundary consumed by the nested-cross reindexing: the Fourier decay is already outside and all diagonal exceptions have been removed under product Haar measure.
Pull the endpoint-erased four-direct core back to the literal initial nested-cross carrier.
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Initial nested-carrier form of the four-direct endpoint estimate.
Exact coupling identity for the four-direct core.
The existing grouped-to-complete-run theorem contains four artificial inverse-square endpoint masses because it was designed for arbitrary terminal kernels. Here all four endpoint kernels have already been Fourier-integrated. We instantiate that theorem with unit scales and cancel its strictly positive inverse-square mass, leaving exactly the two endpoint-erased scale products times the literal complete nested run.
Paper-order four-direct endpoint estimate in the literal complete-run currency. The coupling power is inserted only after the four exact Fourier operations and the first norm; the preceding exact identity then moves it onto the nested run.
Integrated four-direct endpoint estimate. The right-hand side is the literal complete nested run multiplied only by the two endpoint-erased terminal scale products and the exact Fourier weights.
Consume the existing complete-run primitive-majorant estimate without changing the four-direct endpoint ledger. In particular, the exact two Fourier decays and the endpoint-erased terminal scale product stay outside the run integral.
Budget counterpart of the direct incoming geometry: if the first internal vertex survives, no literal head can have updated slot zero, so its numerical scale is still the initial Green base.
In a direct/direct half, deleting the two external scale slots can only
decrease the compatible complete budget: both omitted numerical boundary
slots are still the initial base A, and A >= 1.
Complete-budget terminal scales, independent of endpoint cases #
Two completed budget histories, possibly obtained through exceptional endpoint stops rather than the ordinary certified trace, have the same ambient-order scale closure. This is the common numerical consumer for all sixteen endpoint patterns: the endpoint calculation may change the dependent terminal carrier, but it does not change the exact complete budget recurrence.
Integrated form of the complete-budget terminal-scale closure. Unlike the direct/direct specialization below, this theorem only asks that each completed half carry a reachable budget scale, so it is available after either direct or exceptional endpoint elimination.
Package the completed carriers of two literal alternating transports.
This is the endpoint-pattern analogue of ofCertifiedTraces: exceptional
heads may have occurred, but both transports still finish the same paper
schedule.
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Pull an arbitrary density on two completed half carriers to the literal initial nested-cross carrier.
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- terminal.initialNestedPullback pi density v = density ((terminal.terminalProductPiMeasurableEquivNested pi).symm v)
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The product-terminal and initial nested integrals of an arbitrary density agree exactly.
Pull an a.e. terminal-product bound to the initial nested carrier.
Common Step 3 consumer for a completed signed endpoint branch. The branch-specific proof is required only to dominate its post-endpoint density by the literal grouped majorant. The coupling power is inserted after that domination and then converted exactly to the complete nested run.
Integrated form of the common signed-endpoint consumer. It keeps the literal endpoint weight outside the complete-run integral.
End-to-end numerical consumer for any signed endpoint pattern. The
pattern-specific work stops at hendpoint; the existing complete-run
estimate and the exact reachable-scale recurrence then place the result in
one ambient-order primitive-majorant currency.
Inflate the complete-run primitive constant just enough to replace the four artificial inverse-square endpoint masses by the four exact Fourier integrations of the direct/direct branch.
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The single fixed inflation above compensates the missing four endpoint masses at every nonempty nested-cross order.
Pointwise two-half scale absorption for the four-direct branch. This
is the direct/direct analogue of
r324_twoHalf_initial_terminalScale_mul_majorant_le, with the endpoint
slots already Fourier-integrated and therefore absent from the analytic
scale product.
Integrated form of the four-direct two-half scale absorption.
Direct/direct residual branch in ambient-order inserted-majorant currency, for fixed compatible traces and a supplied complete-run bound.
Uniform producer for the all-four-direct residual endpoint pattern. The constants are chosen before the scale, order, refined schedule, and Fourier modes.
Endpoint classification on the actual refined-fibre representative #
The four endpoint cases attached to the representative which actually
appears in the signed physical-collapse theorem. This deliberately does
not use r324RefinedScheduleRepresentative, whose choice is only made in
the coarser contraction fibre.
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The endpoint pattern is independent of which representative of the fixed within-half signature is used. In particular, the representative chosen in the residual-refined fibre has the same four paper endpoint cases as the representative chosen in the coarser contraction fibre.
The proof uses the rigidity of the actual extraction recursion under a fixed endpoint signature; it does not assume invariance of the refined representative as extra data.
A residual single in the coarse schedule representative is therefore also present in the refined-fibre representative used by the exact signed physical collapse.
Definitional four-bit classification for the actual refined representative.
The exact two-half endpoint ledger #
The two endpoint cases belonging to the left half, in the paper order incoming then outgoing.
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- Anderson4D.r324LeftHalfEndpointCases cases = ![cases 0, cases 1]
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The two endpoint cases belonging to the right half, in the paper order incoming then outgoing.
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- Anderson4D.r324RightHalfEndpointCases cases = ![cases 2, cases 3]
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Multiplying the two genuine half-chain endpoint costs gives exactly the
four-endpoint cost of Step 4(A). In particular no uniform epsilon^{-2} is
inserted at a direct endpoint while the two halves are spliced.
The paper-faithful residual endpoint interface before the last uniform
epsilon^{-8} enlargement. The physical producer records the four cases
of the representative which actually occurs in the signed collapse; a
direct endpoint therefore still has cost exactly one here.
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Only after the four signed endpoint operations have been assembled do
we replace their literal case product by the paper's uniform
epsilon^{-8} budget.
Coarse-interface form of the genuine all-four-direct producer. The
public residual branch is stated using the schedule representative, while
the signed collapse uses the representative of the residual-refined fibre.
Endpoint-signature rigidity supplies the bridge, and the stronger direct
estimate is enlarged to the common paper epsilon^{-8} currency only at
the final scalar step.