High-contrast homogenization: Entry.Annealed.TransportReduction #
Imported from the Apache-2.0 HighContrastHomogenization development at commit
7a13dbcd8d6609264a713373f5c69ceeac870472.
Two-grid transport reduction #
This module proves the block arithmetic underlying the two-grid transport estimate
p.two.grid.transport. It establishes the scale-monotonicity of the doubled identity and
the trace excess of subtracting that identity, the comparison of normalized blocks at
Schatten order one, and the uniform bound on the normalization loss over the window
δ ∈ [0, 1/4]. It then records the deterministic weighted gap inequality and the finite
and centred mean-split identities that decompose a normalized Whitney sum into its row
means plus one integrable tail, the splitting of the actual sum into a bulk row, boundary
rows and the fine subseries, the convexity, scaling and addition estimates for the source
and mean-penalty powers, and the pointwise comparison of a normalized row taken before
any maximum over rows or target cells.
Scalar order on the doubled identity, including zero coefficients.
The additive Cδ error comes from subtracting the doubled identity after the norm change.
The deterministic term in the joint gap is a sum of mean penalties. The centered term remains under the joint maximum.
Expectation respects an a.e. finite decomposition with one integrable tail.
Centering commutes with a finite row decomposition plus one integrable tail. The triangle estimate has no factor for the number of rows.
A positive tail bounded by one scalar envelope stays bounded after centering. The same X is available to the later joint maximum.
Stationarity identifies each centered cell in an actual finite Whitney row. The identity is pointwise and therefore remains valid under the joint maximum.
At the trace level, missing volume is filled by the identity. The finite part has mass at most one, so the normalization error is Cδ, independent of how many rows or cells occur.
The actual normalized Whitney sum has precisely a finite bulk row, finite boundary rows, and the fine subseries. Convergence is supplied by the source bounds; no coarse block is evaluated on the remainder of the partition.
The normalizer change is pointwise on the whole centered row, before any maximum over rows or target cells is taken.
p.two.grid.transport,
with the actual Whitney rows. The hypotheses on the fine
part are the normalized conclusions of transport_fine_source_tail; the
membership of the whole sum is furnished by exists_transport_whitney_ordered_data.
One scalar X controls the tail for every subsequent target.
Insert the missing mass at zero trace excess, then separate the normalizer error and both powers of the source error. The constant precedes every weight.
The expectation of the actual Whitney sum is the finite weighted sum of stationary row means plus the expectation of the fine subseries.