Pith Number

pith:PM7M33LJ

pith:2000:PM7M33LJKWKK4GLLXK355WHU47

not attested not anchored not stored refs pending

The effects of a Variable IMF on the Chemical Evolution of the Galaxy

Cristina Chiappini (1), Francesca Matteucci (2) ((1) Columbia University, Italy), USA (2) Universita di Trieste

arxiv:astro-ph/0004029 v1 · 2000-04-03 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PM7M33LJKWKK4GLLXK355WHU47}

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	2026-05-18T01:21:57.185631Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b3ecded695594ae196bbab7ded8f4e7ce97008c72b71f73ae071ddbf95e617b

Aliases

arxiv: astro-ph/0004029 · arxiv_version: astro-ph/0004029v1 · doi: 10.48550/arxiv.astro-ph/0004029 · pith_short_12: PM7M33LJKWKK · pith_short_16: PM7M33LJKWKK4GLL · pith_short_8: PM7M33LJ

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/PM7M33LJKWKK4GLLXK355WHU47 \
  | 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: 7b3ecded695594ae196bbab7ded8f4e7ce97008c72b71f73ae071ddbf95e617b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb6ad04e46a5106870dc99e1ca225f19433a7b574cebd4e40d99b0b2b9d8fd92",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-04-03T23:59:19Z",
    "title_canon_sha256": "e632f3d7a533edaf49b7d2e39e1fb8477e8211157a2effc2dd2b98cf8717efa0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0004029",
    "kind": "arxiv",
    "version": 1
  }
}