Pith Number

pith:SPHG2MML

pith:2013:SPHG2MMLAS6FAMOEF7K5CQR3WV

not attested not anchored not stored refs pending

Testing the effects from dark radiation

Yi Zhang, Yungui Gong

arxiv:1306.6663 v1 · 2013-06-27 · 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{SPHG2MMLAS6FAMOEF7K5CQR3WV}

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	2026-05-18T01:49:06.830410Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93ce6d318b04bc5031c42fd5d1423bb55f841310a4cdfa8e1d3380d9a5b0c301

Aliases

arxiv: 1306.6663 · arxiv_version: 1306.6663v1 · doi: 10.48550/arxiv.1306.6663 · pith_short_12: SPHG2MMLAS6F · pith_short_16: SPHG2MMLAS6FAMOE · pith_short_8: SPHG2MML

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/SPHG2MMLAS6FAMOEF7K5CQR3WV \
  | 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: 93ce6d318b04bc5031c42fd5d1423bb55f841310a4cdfa8e1d3380d9a5b0c301

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9392bf3f0e6d188ac519184461e9a75703eb2933bcf998b40a10d89b45e40643",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-06-27T21:26:19Z",
    "title_canon_sha256": "a6a3664182fc3927f61c53347d71da430953c5bd9b3c7249959746fab60932aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.6663",
    "kind": "arxiv",
    "version": 1
  }
}