Pith Number

pith:BN4QMHGQ

pith:2019:BN4QMHGQI65JMUR5GFL7NONNGN

not attested not anchored not stored refs pending

Stellar chromospheric activity and age relation from open clusters in the LAMOST Survey

Gang Zhao, Jiajun Zhang, Jingkun Zhao, Jing Zhong, Terry D. Oswalt, Xiangsong Fang, Xianhao Ye, Xilong Liang

arxiv:1909.13520 v1 · 2019-09-30 · astro-ph.SR · 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{BN4QMHGQI65JMUR5GFL7NONNGN}

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	2026-07-05T00:31:59.212178Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b79061cd047ba96523d3157f6b9ad337e1ae10e62faf5a2e786d7c303938a7e

Aliases

arxiv: 1909.13520 · arxiv_version: 1909.13520v1 · doi: 10.48550/arxiv.1909.13520 · pith_short_12: BN4QMHGQI65J · pith_short_16: BN4QMHGQI65JMUR5 · pith_short_8: BN4QMHGQ

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/BN4QMHGQI65JMUR5GFL7NONNGN \
  | 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: 0b79061cd047ba96523d3157f6b9ad337e1ae10e62faf5a2e786d7c303938a7e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48afa288a7477a26bf26d2948b709e7c96ffd58daf48c379c9fd55f46f839705",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-09-30T08:43:04Z",
    "title_canon_sha256": "498bc8d5b036ee7182084ef8b886c95f3819bbea0d413ebf19576d09e0af5847"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.13520",
    "kind": "arxiv",
    "version": 1
  }
}