Pith Number

pith:7M7ME3KN

pith:2019:7M7ME3KNLYNGPKARMOBJMY75MH

not attested not anchored not stored refs pending

The mass-radius relation for neutron stars in $f(R)=R+\alpha R^2$ gravity: a comparison between purely metric and torsion formulations

Pasquale Feola, Roberto Cianci, Salvatore Capozziello, Stefano Vignolo, Xisco Jimenez Forteza

arxiv:1909.08847 v2 · 2019-09-19 · astro-ph.HE · gr-qc · hep-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7M7ME3KNLYNGPKARMOBJMY75MH}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

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.

Receipt and verification

First computed	2026-07-05T00:43:37.349889Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb3ec26d4d5e1a67a81163829663fd61e3c2f65b51d54e7cf1e8f2edf4860352

Aliases

arxiv: 1909.08847 · arxiv_version: 1909.08847v2 · doi: 10.48550/arxiv.1909.08847 · pith_short_12: 7M7ME3KNLYNG · pith_short_16: 7M7ME3KNLYNGPKAR · pith_short_8: 7M7ME3KN

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/7M7ME3KNLYNGPKARMOBJMY75MH \
  | 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: fb3ec26d4d5e1a67a81163829663fd61e3c2f65b51d54e7cf1e8f2edf4860352

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2688182d4df060b6728f72ff50e5465feee61bcd0fe5e4d52c6b0e71e4946bd4",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-09-19T08:16:03Z",
    "title_canon_sha256": "ad68d1b48dd229a4d4c1e8ef662365ac006310fc48932d308855938c4a062cc7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.08847",
    "kind": "arxiv",
    "version": 2
  }
}