Signed Analytic error plus documentation - #172
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Adds the docs/source/background tree covering overlap, kinetic, nuclear attraction, and electron repulsion integrals, including the density-fitting derivation. Wires up sphinxcontrib-bibtex with a references.bib, and excludes that file from the license header check. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Adds two background pages under docs/source/background/eris/: - screening.rst documents the primitive screening models the package already implements (coarse K_ij, libint's fine metric, Cauchy-Schwarz) and records which are actually rigorous bounds. The coarse and fine metrics derive from the s-type closed form and retain no angular prefactor, so they do not bound l > 0 contributions; Cauchy-Schwarz does, at every angular momentum. - error_bounds.rst derives a rigorous two-sided bracket on the error from neglecting primitive contributions. A Cauchy-Schwarz magnitude bound brackets each discarded quartet symmetrically; a three-valued sign oracle collapses that to a half-interval where the sign can be established a priori. The bound is valid with no sign information and tightens monotonically as coverage grows. Scopes the existing bibliography directives per-document and gives each a label prefix so the three pages cite disjoint key sets without duplicate-label warnings under -W. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Description
This PR adds:
TaylorModel's truncation order, and eventuallyTAffine's threshold) and the UQ type to use.TODOs