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Observational cosmology using characteristic numerical relativity

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Paper breakdownThe authors' claims, conditions and measurements, as JSON Signed receiptProof this review has not been altered
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P.J. van der Walt, N.T. Bishop

General Relativity and Quantum Cosmology · Submitted 19 Jul 2010

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim It is demonstrated that, at an earlier epoch of the LTB model, the observational data would not be consistent with that of the $\Lambda$CDM model.

how it is stated · asserted 1.00 read the record →

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arXiv ID1007.3189 (version 1)
Pith IDJ4BATMFE, Pith's permanent record of this paper and its review
CitationN.T. Bishop, P.J. van der Walt. "Observational cosmology using characteristic numerical relativity." arXiv:1007.3189 (2010). https://pith.science/paper/J4BATMFE
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The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

Open the compiled record

Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,681 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.18 · human participants 0.01 · controlled comparison 0.54 · randomized assignment 0.01 · states quantitative result 0.05 · compares with prior results 0.80 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; .

The characteristic formalism in numerical relativity, which has been developed to study gravitational waves, and the observer metric approach in observational cosmology both make use of coordinate systems based on null cones. In this paper, these coordinate systems are compared and it is then demonstrated how characteristic numerical relativity can be used to investigate problems in observational cosmology. In a numerical experiment using the characteristic formalism, it is shown how the historical evolution of a LTB universe compares to that of the $\Lambda$CDM model given identical observational data on a local observer's past null cone. It is demonstrated that, at an earlier epoch of the LTB model, the observational data would not be consistent with that of the $\Lambda$CDM model.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 The characteristic formalism in numerical relativity, which has been developed to study gravitational waves, and the observer metric approach in observational cosmology both make use of coordinate systems based on null cones. background 1.00 0.06 0.03 asserted 1.00
s1 In this paper, these coordinate systems are compared and it is then demonstrated how characteristic numerical relativity can be used to investigate problems in observational cosmology. contribution 0.99 0.89 0.13 asserted 1.00
s2 In a numerical experiment using the characteristic formalism, it is shown how the historical evolution of a LTB universe compares to that of the $\Lambda$CDM model given identical observational data on a local observer's past null cone. method 0.52 0.95 0.13 asserted 1.00
s3 It is demonstrated that, at an earlier epoch of the LTB model, the observational data would not be consistent with that of the $\Lambda$CDM model. result 1.00 0.88 0.54 asserted 1.00

What kind of paper the classifier reports this is: simulation study 0.91 · evidence from simulation or computation 1.00.

What was examined, and what was not

sources read
  • arXiv listing abstract v1
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
levels run
  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

The characteristic formalism in numerical relativity, which has been developed to study gravitational waves, and the observer metric approach in observational cosmology both make use of coordinate systems based on null cones. In this paper, these coordinate systems are compared and it is then demonstrated how characteristic numerical relativity can be used to investigate problems in observational cosmology. In a numerical experiment using the characteristic formalism, it is shown how the historical evolution of a LTB universe compares to that of the $\Lambda$CDM model given identical observational data on a local observer's past null cone. It is demonstrated that, at an earlier epoch of the LTB model, the observational data would not be consistent with that of the $\Lambda$CDM model.

Human review

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References
How the literature uses it

2 arXiv papers cite this in 4 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

What it cites

Cites as background 1 paper

Discussion

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