Alphabeta Math
AlgorithmAlgorithm: Literature-sourcedProof: Not applicablePipeline-generatedjudge pass (gpt-6-luna)
How statement and proof provenance work

The first chip identifies the source of the statement or construction; the second identifies the source of its local proof or verification.

  • Literature-sourced: the exact statement appears in a cited source; only wording and notation differ.
  • AI-adapted: a semantically identical restatement of literature-sourced material, modulo indexing, notation, and boundary cases adopted by the library.
  • AI-generated: a genuinely novel statement formulated by AI, with no source for the claim itself.

These labels describe origin, not correctness: citations and verification chips remain separate evidence.

Finite truncated tanh–sinh, exp–sinh, and sinh–sinh trapezoid rules

Definition

Input a real function f that is continuous on the interior of the selected target domain, a step h>0, nonnegative integers N−,N+, and exactly one domain mode. The finite rule evaluates f only at interior points:

  1. Finite interval (a,b), a<b. Put m=(a+b)/2, d=(b−a)/2, s(t)=sinh⁡t=(et−e−t)/2, c(t)=cosh⁡t=(et+e−t)/2, and ψ(t)=tanh⁡((π/2)s(t)), where tanh⁡u=sinh⁡u/cosh⁡u. Set x(t)=m+dψ(t), x′(t)=d(π/2)c(t)/cosh⁡2((π/2)s(t)), and Φ(t)=f(x(t))x′(t).
  2. Positive half-line (0,∞). Here f is continuous on (0,∞). Set x(t)=exp⁡((π/2)s(t)), x′(t)=x(t)(π/2)c(t), and Φ(t)=f(x(t))x′(t).
  3. Whole line R. Here f is continuous on R. Set x(t)=sinh⁡((π/2)s(t)), x′(t)=cosh⁡((π/2)s(t))(π/2)c(t), and Φ(t)=f(x(t))x′(t).

Return the finite sum Th,N−,N+(f)=h∑k=−N−N+Φ(kh). The algorithm makes no accuracy claim from integrability alone. Analytic-strip and tail hypotheses required for an error certificate are stated in A finite double-exponential trapezoid has separate strip and tail errors ↗.

Depends on

Used by

Dependency tree · two levels

13 results within two dependency steps of this one, each drawn at its shortest distance from it. An arrow runs from a result to what uses it, so the chart reads left to right and ends at this result, which carries a heavier outline. Every node is a link to that result. Click elsewhere on the chart to enlarge it.

Sources