Pith Number

pith:SOPRETWN

pith:2012:SOPRETWNTVRBQYOBJAMCJNX5HO

not attested not anchored not stored refs pending

Surface singularities in Eddington-inspired Born-Infeld gravity

Paolo Pani, Thomas P. Sotiriou

arxiv:1209.2972 v2 · 2012-09-13 · gr-qc · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SOPRETWNTVRBQYOBJAMCJNX5HO}

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	2026-05-18T03:37:40.888811Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

939f124ecd9d621861c1481824b6fd3ba0fcb906a6385f9c658fe344f3c73b4d

Aliases

arxiv: 1209.2972 · arxiv_version: 1209.2972v2 · doi: 10.48550/arxiv.1209.2972 · pith_short_12: SOPRETWNTVRB · pith_short_16: SOPRETWNTVRBQYOB · pith_short_8: SOPRETWN

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/SOPRETWNTVRBQYOBJAMCJNX5HO \
  | 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: 939f124ecd9d621861c1481824b6fd3ba0fcb906a6385f9c658fe344f3c73b4d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55f5173ff56acb421bf6d748ab3b29ced303aed83712a690e028c2f2685bdbb4",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2012-09-13T17:36:27Z",
    "title_canon_sha256": "89b40831af10aedb4e6439bafb1045d3cf8c0f90e29fbfd2c6c5d825b57a5afe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.2972",
    "kind": "arxiv",
    "version": 2
  }
}