Pith Number

pith:IOUPWF2Q

pith:2011:IOUPWF2Q2X7JY2HW5F5WSAFKIU

not attested not anchored not stored refs pending

Chemical Evolution of Dwarf Irregular and Blue Compact Galaxies

Francesca Matteucci, Giovanni Vladilo, Jun Yin

arxiv:1102.4197 v1 · 2011-02-21 · 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{IOUPWF2Q2X7JY2HW5F5WSAFKIU}

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	2026-05-18T02:03:07.158049Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

43a8fb1750d5fe9c68f6e97b6900aa451117ffaecdadba6ac4900854e794ba91

Aliases

arxiv: 1102.4197 · arxiv_version: 1102.4197v1 · doi: 10.48550/arxiv.1102.4197 · pith_short_12: IOUPWF2Q2X7J · pith_short_16: IOUPWF2Q2X7JY2HW · pith_short_8: IOUPWF2Q

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/IOUPWF2Q2X7JY2HW5F5WSAFKIU \
  | 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: 43a8fb1750d5fe9c68f6e97b6900aa451117ffaecdadba6ac4900854e794ba91

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c40aef5e70b041e7ae63078d9dff5a9336ff52d483a2b6594f3dd42c36b9ec9a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-02-21T11:52:46Z",
    "title_canon_sha256": "e5dc27abf3e6d8c53142f6576113022b1806ad927e6340d02197ffcd38b21c7f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.4197",
    "kind": "arxiv",
    "version": 1
  }
}