Pith Number

pith:Q2PJUT44

pith:2013:Q2PJUT44DJMFP6HXGK53JOLV2P

not attested not anchored not stored refs pending

Constraints on supermassive black hole spins from observations of active galaxy jets

E. Kun, Gopal-Krishna, L. \'A. Gergely, P. J. Wiita, P. L. Biermann, Z. Keresztes

arxiv:1312.4253 v1 · 2013-12-16 · astro-ph.HE · gr-qc · hep-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q2PJUT44DJMFP6HXGK53JOLV2P}

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	2026-05-18T03:04:35.127087Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

869e9a4f9c1a5857f8f732bbb4b975d3d2393685853e03ee5a695c515b1fff8d

Aliases

arxiv: 1312.4253 · arxiv_version: 1312.4253v1 · doi: 10.48550/arxiv.1312.4253 · pith_short_12: Q2PJUT44DJMF · pith_short_16: Q2PJUT44DJMFP6HX · pith_short_8: Q2PJUT44

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/Q2PJUT44DJMFP6HXGK53JOLV2P \
  | 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: 869e9a4f9c1a5857f8f732bbb4b975d3d2393685853e03ee5a695c515b1fff8d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80eaa2bf9aed01b6076756fbfcd9a3526ddb2d7c0b97e50a487147fa572a9490",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-12-16T06:16:40Z",
    "title_canon_sha256": "8128b7284cd355a5277fa9cdc142092e7193ca7d582efbbc41546c1d92190724"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.4253",
    "kind": "arxiv",
    "version": 1
  }
}