Pith Number

pith:L2S5OLQK

pith:2013:L2S5OLQKMPEMJFBLOBJLEO3HTO

not attested not anchored not stored refs pending

The Chemical Imprint of Silicate Dust on the Most Metal-Poor Stars

Alexander P. Ji (MIT), Anna Frebel (MIT), Volker Bromm (UT Austin)

arxiv:1307.2239 v2 · 2013-07-08 · 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{L2S5OLQKMPEMJFBLOBJLEO3HTO}

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	2026-05-18T01:48:58.571187Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5ea5d72e0a63c8c4942b7052b23b679bba55dc03d269ac332bcd57e873fff6a6

Aliases

arxiv: 1307.2239 · arxiv_version: 1307.2239v2 · doi: 10.48550/arxiv.1307.2239 · pith_short_12: L2S5OLQKMPEM · pith_short_16: L2S5OLQKMPEMJFBL · pith_short_8: L2S5OLQK

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/L2S5OLQKMPEMJFBLOBJLEO3HTO \
  | 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: 5ea5d72e0a63c8c4942b7052b23b679bba55dc03d269ac332bcd57e873fff6a6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de24499b29614a805d3bd1bbce035e65987f81b6b400bcc852fbf82b74bce0a9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-07-08T20:00:02Z",
    "title_canon_sha256": "325cc3a75a4da5d932ca03e07ed1fe5e22dcfb66dab4269721b034778caf6a67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.2239",
    "kind": "arxiv",
    "version": 2
  }
}