Pith Number

pith:7DLAYDYK

pith:2019:7DLAYDYK44IBY6HQ3OQZNT4FB3

not attested not anchored not stored refs pending

Spatial variations in the Milky Way disc metallicity-age relation

Alexandre Roman-Lopes, Christian Nitschelm, D.A. Garcia-Hernandez, Diane K. Feuillet, Karin Lind, Neige Frankel, Peter M. Frinchaboy, Richard R. Lane

arxiv:1908.02772 v1 · 2019-08-07 · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7DLAYDYK44IBY6HQ3OQZNT4FB3}

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	2026-07-05T00:02:02.174465Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8d60c0f0ae7101c78f0dba196cf850ed5e01dcd9fe11139561b72010aecd947

Aliases

arxiv: 1908.02772 · arxiv_version: 1908.02772v1 · doi: 10.48550/arxiv.1908.02772 · pith_short_12: 7DLAYDYK44IB · pith_short_16: 7DLAYDYK44IBY6HQ · pith_short_8: 7DLAYDYK

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/7DLAYDYK44IBY6HQ3OQZNT4FB3 \
  | 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: f8d60c0f0ae7101c78f0dba196cf850ed5e01dcd9fe11139561b72010aecd947

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28679160e55cd72b8a347baec5de32b04ee8399ed2d779a37dc0f5c73e17a940",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-08-07T18:00:12Z",
    "title_canon_sha256": "9fb848526ca34e0374ef48003eef8caed48b28dc939033c3bed9d9420ab21e1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.02772",
    "kind": "arxiv",
    "version": 1
  }
}