Pith Number

pith:PLDGQI5U

pith:2009:PLDGQI5UM5DYEFUM7DIH5NGIGC

not attested not anchored not stored refs pending

The metallicity gradient as a tracer of history and structure: the Magellanic Clouds and M33 galaxies

Maria-Rosa L. Cioni

arxiv:0904.3136 v2 · 2009-04-20 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PLDGQI5UM5DYEFUM7DIH5NGIGC}

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	2026-05-18T02:13:58.723997Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ac66823b4674782168cf8d07eb4c8308e2379b8608b09843b400c84fbab64d0

Aliases

arxiv: 0904.3136 · arxiv_version: 0904.3136v2 · doi: 10.48550/arxiv.0904.3136 · pith_short_12: PLDGQI5UM5DY · pith_short_16: PLDGQI5UM5DYEFUM · pith_short_8: PLDGQI5U

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/PLDGQI5UM5DYEFUM7DIH5NGIGC \
  | 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: 7ac66823b4674782168cf8d07eb4c8308e2379b8608b09843b400c84fbab64d0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a97cca14efb035e47d33a1c94d08afbdd98113d41c285ab97260d558c450126",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-20T23:13:28Z",
    "title_canon_sha256": "228b8dfc3186712b2c8f6f9bddc5ce04a440e93b3f5bb48bfb4fe299eabf3b1b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.3136",
    "kind": "arxiv",
    "version": 2
  }
}