Pith Number

pith:PJCIGP5K

pith:2021:PJCIGP5KLGSQOXJ2VC4LPPG7UH

not attested not anchored not stored refs pending

Evolution of the local spiral structure of the Milky Way revealed by open clusters

C. J. Hao, D. J. Liu, J. J. Li, L. G. Hou, S. B. Bian, Y. J. Li, Y. Xu, Z. H. He, Z. Y. Wu

arxiv:2107.06478 v1 · 2021-07-14 · 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{PJCIGP5KLGSQOXJ2VC4LPPG7UH}

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	2026-07-05T03:06:32.110407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a44833faa59a5075d3aa8b8b7bcdfa1cffaa95a09a26edf689274b312ad4b3d

Aliases

arxiv: 2107.06478 · arxiv_version: 2107.06478v1 · doi: 10.48550/arxiv.2107.06478 · pith_short_12: PJCIGP5KLGSQ · pith_short_16: PJCIGP5KLGSQOXJ2 · pith_short_8: PJCIGP5K

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/PJCIGP5KLGSQOXJ2VC4LPPG7UH \
  | 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: 7a44833faa59a5075d3aa8b8b7bcdfa1cffaa95a09a26edf689274b312ad4b3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd73e95b98cf7e0cdf863c4d1743fedd01e35becd9ebc0f40c212d5076ba7af1",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-07-14T04:24:25Z",
    "title_canon_sha256": "def41a92528feb0a2ae5f445ab1aa281de8bbdf4cf1bf86d9d6b5efb2170070f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.06478",
    "kind": "arxiv",
    "version": 1
  }
}