Pith Number

pith:MO5BHXIE

pith:2026:MO5BHXIEANM3ZKPALVU7D3FEMB

not attested not anchored not stored refs resolved

Energy conditions in consistent perfect fluid cosmology

Christian G. Boehmer, Davide Batic, Denys Dutykh

In f(R,T)=R+σRT cosmology, dust acquires negative pressure and drives acceleration inside a finite Hubble window where only the strong energy condition is violated.

arxiv:2605.14479 v1 · 2026-05-14 · gr-qc

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4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

For dust and σ>0 the effective fluid acquires negative pressure and can drive accelerated expansion. In this dust case, there exists a finite window in the Hubble parameter during which the strong energy condition is violated, but the null, weak, and dominant energy conditions remain satisfied.

C2weakest assumption

The specific choice f(R,T)=R+σRT together with the Brown variational principle yields a consistent effective fluid whose energy conditions can be expressed as polynomial inequalities in the Hubble parameter.

C3one line summary

In consistent R T-coupled f(R,T) cosmology, dust allows accelerated expansion in a Hubble window violating only the strong energy condition, with an upper bound on σ from the 1 + σ T > 0 requirement.

References

33 extracted · 33 resolved · 0 Pith anchors

[1] e. a. A. G. Riess,Observational evidence from supernovae for an accelerating universe and a cosmological constant, Astron. J.116(1998) 1009 1998

[2] S. P. et al.,Measurements of omega and lambda from 42 high-redshift supernovae, Astrophys. J. 517(1999) 565 1999

[3] N. A. et al.,Planck 2018 results. vi. cosmological parameters, A&A641(2020) A6 2018

[4] D. Baumann,Cosmology. Cambridge University Press, 2022 2022

[5] A. G. A. et al.,Desi 2024 vi: Cosmological constraints from the measurements of baryon acoustic oscillations, JCAP02(2025) 021 2024

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-17T23:39:06.567775Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

63ba13dd040359bca9e05d69f1eca4607bf3b799f40f93e843422bca608a0f92

Aliases

arxiv: 2605.14479 · arxiv_version: 2605.14479v1 · doi: 10.48550/arxiv.2605.14479 · pith_short_12: MO5BHXIEANM3 · pith_short_16: MO5BHXIEANM3ZKPA · pith_short_8: MO5BHXIE

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/MO5BHXIEANM3ZKPALVU7D3FEMB \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 63ba13dd040359bca9e05d69f1eca4607bf3b799f40f93e843422bca608a0f92

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1a1e8edd1c998b4272304faa27805586a0b09203fa90bbbf18f0a5a86ac6814",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2026-05-14T07:18:44Z",
    "title_canon_sha256": "1ea0981109af9040894e60d90cbd5a8d20b407e0c5d272e87129d9a7f06dd016"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.14479",
    "kind": "arxiv",
    "version": 1
  }
}