Pith Number

pith:2V7AKCT5

pith:2016:2V7AKCT5EC5DZD7KYBZHNVDAF7

not attested not anchored not stored refs pending

Chemical evolution of the Universe at 0.7 < z < 1.6 derived from abundance diagnostics of the broad-line region of quasars

Hiroaki Sameshima, Kimiaki Kawara, Yuzuru Yoshii

arxiv:1611.06027 v1 · 2016-11-18 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2V7AKCT5EC5DZD7KYBZHNVDAF7}

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	2026-05-18T00:52:37.808285Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d57e050a7d20ba3c8feac07276d4602fcde04e9c615c8dcf2ddd3122fc66a38d

Aliases

arxiv: 1611.06027 · arxiv_version: 1611.06027v1 · doi: 10.48550/arxiv.1611.06027 · pith_short_12: 2V7AKCT5EC5D · pith_short_16: 2V7AKCT5EC5DZD7K · pith_short_8: 2V7AKCT5

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/2V7AKCT5EC5DZD7KYBZHNVDAF7 \
  | 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: d57e050a7d20ba3c8feac07276d4602fcde04e9c615c8dcf2ddd3122fc66a38d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "598de5aa77b8fdf1320ea23dcaa2af4d04fd33bbfac75525b3347745e15999fd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-11-18T10:09:12Z",
    "title_canon_sha256": "603765ec37da66e35f696e48b792a346cfa0cf1158847a1df5b86d3b8aef6077"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.06027",
    "kind": "arxiv",
    "version": 1
  }
}