Pith Number

pith:HFF7B7KN

pith:2013:HFF7B7KNE2MKVKFKRTF6COWCMR

not attested not anchored not stored refs pending

Abundance Profiling of Extremely Metal-Poor Stars and Supernova Properties in the Early Universe

Ken'ichi Nomoto, Nobuyuki Iwamoto, Nozomu Tominaga

arxiv:1309.6734 v2 · 2013-09-26 · astro-ph.SR · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HFF7B7KNE2MKVKFKRTF6COWCMR}

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	2026-05-18T01:47:26.419305Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

394bf0fd4d2698aaa8aa8ccbe13ac2644967842b973e97430ab0bfef82b511ad

Aliases

arxiv: 1309.6734 · arxiv_version: 1309.6734v2 · doi: 10.48550/arxiv.1309.6734 · pith_short_12: HFF7B7KNE2MK · pith_short_16: HFF7B7KNE2MKVKFK · pith_short_8: HFF7B7KN

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/HFF7B7KNE2MKVKFKRTF6COWCMR \
  | 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: 394bf0fd4d2698aaa8aa8ccbe13ac2644967842b973e97430ab0bfef82b511ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88960085ea1aa5ee3971d7663abddf3f02ffc5f4ece926a80b875d75f75c8c9d",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-09-26T06:58:42Z",
    "title_canon_sha256": "d1c2b5569f2fe9d0db4a02a539c600b6aaa087458080e8c7ac5d9c31d42824c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.6734",
    "kind": "arxiv",
    "version": 2
  }
}