Pith Number

pith:C7WBNY3T

pith:2009:C7WBNY3TN4MJUBZKKHGQMPEJLP

not attested not anchored not stored refs pending

Viable Singularity-Free f(R) Gravity Without a Cosmological Constant

Ioav Waga, Miguel Quartin, Sergio E. Joras, V Miranda

arxiv:0905.1941 v1 · 2009-05-12 · astro-ph.CO · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C7WBNY3TN4MJUBZKKHGQMPEJLP}

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.

Cited by

1 paper in Pith

Testing General Relativity with Present and Future Astrophysical Observations

Receipt and verification

First computed	2026-05-18T00:05:40.197934Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17ec16e3736f189a072a51cd063c895bed2897a907b6b2bcfdba28e9f19b7c72

Aliases

arxiv: 0905.1941 · arxiv_version: 0905.1941v1 · doi: 10.48550/arxiv.0905.1941 · pith_short_12: C7WBNY3TN4MJ · pith_short_16: C7WBNY3TN4MJUBZK · pith_short_8: C7WBNY3T

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/C7WBNY3TN4MJUBZKKHGQMPEJLP \
  | 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: 17ec16e3736f189a072a51cd063c895bed2897a907b6b2bcfdba28e9f19b7c72

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8dad59d27368eec4f903e367c290e9959c63afa7ca273ce4ec042db73e2378e4",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-12T19:18:24Z",
    "title_canon_sha256": "9cf9812848ef07123a345ebe0303a84f86599f0e6f0e4be1f3a14a3a3b4484f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.1941",
    "kind": "arxiv",
    "version": 1
  }
}