Pith Number

pith:FT24E62C

pith:2020:FT24E62C4OEIPWQKTAMZ7D5BT2

not attested not anchored not stored refs pending

Supermassive black holes as possible sources of ultra high energy cosmic rays

Arman Tursunov, Bobomurat Ahmedov, Martin Kolo\v{s}, Naresh Dadhich, Zden\v{e}k Stuchl\'ik

arxiv:2004.07907 v2 · 2020-04-16 · astro-ph.HE · 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{FT24E62C4OEIPWQKTAMZ7D5BT2}

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	2026-07-05T01:05:12.471240Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2cf5c27b42e38887da0a98199f8fa19e8d5ce468322e8f042ad3549514323bb1

Aliases

arxiv: 2004.07907 · arxiv_version: 2004.07907v2 · doi: 10.48550/arxiv.2004.07907 · pith_short_12: FT24E62C4OEI · pith_short_16: FT24E62C4OEIPWQK · pith_short_8: FT24E62C

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/FT24E62C4OEIPWQKTAMZ7D5BT2 \
  | 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: 2cf5c27b42e38887da0a98199f8fa19e8d5ce468322e8f042ad3549514323bb1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a4649b67ee8377ec9b863f8a75195804845db8a1b78a302c4e2697825d3dca5a",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2020-04-16T19:57:01Z",
    "title_canon_sha256": "9565dd97159bc0ce1c4736a2f3507f6323b7698b154103566d583fb05d618c1b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.07907",
    "kind": "arxiv",
    "version": 2
  }
}