Compatibility of the actual copy-path solve with a common-cover change #
The native slot is held fixed while the common cover is refined. Sources are pulled back along the covering map. Equality is proved first for the actual coefficient/forcing paths and then for the constructed Volterra inverse; no native periodicity of an inhomogeneous solution is assumed.
Refine geometry, given by { g with gap := g.gap + k }.
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This includes cutoff indicators and copy envelopes, with no regularity assumption on the native function.
Input data transported through a slow-parameter map and a refinement of the common cover. All native coefficients retain their native arguments.
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Pullback data, given by transformData d id k.
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Equality of input paths may compare different parameter spaces. The canonical zero branch for a noncontinuous slice is respected as well.
Equality of the actual periodized solves, obtained term by term before forming the sum. No periodicity hypothesis on a native inhomogeneous solve is used, or needed.
Changing the integer representative of the native slot center #
Recenter geometry, given by { g with center := g.center + TorusAverages.latticePoint l }.
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- NavierStokes.CopySolveCompatibility.recenterGeometry g l = { gap := g.gap, basis := g.basis, center := g.center + NavierStokes.TorusAverages.latticePoint l }
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Physical units: scaling the actual source scales the actual solution #
Scale source, given by { d with source := fun x => c • d.source x }.
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- NavierStokes.CopySolveCompatibility.scaleSource d c = { coefficient := d.coefficient, forcingMap := d.forcingMap, source := fun (x : P × NavierStokes.TorusInverse.Plane) => c • d.source x }
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Transporting the native clock, its anchor, and its cutoff together #
Native time map, given by (z.1, τ + rate * z.2).
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Time geometry, bundling gap, basis, center.
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Time data, bundling coefficient, forcingMap, source.
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Clock transport is proved from uniqueness of the actual zero-entry Volterra solution on the transported interval.
A single output represented in all transported charts #
Transport data, given by scaleSource (transformData (timeData d τ rate) φ k) amplitude.
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Transport geometry, given by refineGeometry (timeGeometry g τ rate hrate) k.
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- NavierStokes.CopySolveCompatibility.transportGeometry g k τ rate hrate = NavierStokes.CopySolveCompatibility.refineGeometry (NavierStokes.CopySolveCompatibility.timeGeometry g τ rate hrate) k
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Physical output, defined pointwise by d.commonSolve g hab κ (χ x).
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- NavierStokes.CopySolveCompatibility.physicalOutput d g hab κ χ x = d.commonSolve g hab κ (χ x)
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The single reference output is an actual smooth field under the usual compact native cutoff and smooth input hypotheses. Local finiteness of the periodization is supplied by the constructed copy solver.
The family of chart solves represents one explicitly constructed physical field. Assumptions concern only input transport and the coordinate maps; no output equality or chartwise existence witness is assumed.
The slow/torus argument is exactly the existing common-band chart map.
Binding existing chart data through primitive input identities #
These are identities of the coefficient and converted source before any integration. They allow different source/map scalings with the same product, and impose no assertion about solved fields.
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Existing, separately defined chart inputs produce the same single physical output as the canonical transported data when their primitive coefficient and forcing identities are verified.
Why the anchor must be transported as input data #
Constant forcing, bundling coefficient, forcingMap, source.
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Even smooth constant source/coefficient data do not make differently anchored solves equal. This is an actual constructed-solution counterexample.