Pith Number

pith:YCV2QWVQ

pith:2015:YCV2QWVQJIUZJ7JLMFOXQKTNEN

not attested not anchored not stored refs pending

Preserving chemical signatures of primordial star formation in the first low-mass stars

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

arxiv:1508.06137 v2 · 2015-08-25 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YCV2QWVQJIUZJ7JLMFOXQKTNEN}

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	2026-05-18T01:31:31.207065Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c0aba85ab04a2994fd2b615d782a6d235e175096aae2ff6f9217e1064b914c2c

Aliases

arxiv: 1508.06137 · arxiv_version: 1508.06137v2 · doi: 10.48550/arxiv.1508.06137 · pith_short_12: YCV2QWVQJIUZ · pith_short_16: YCV2QWVQJIUZJ7JL · pith_short_8: YCV2QWVQ

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/YCV2QWVQJIUZJ7JLMFOXQKTNEN \
  | 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: c0aba85ab04a2994fd2b615d782a6d235e175096aae2ff6f9217e1064b914c2c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ccd0dd166fa3cb9356c012047091bf24b2ef3505f004b181663a63319f7a4af",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-08-25T13:05:35Z",
    "title_canon_sha256": "c893d46c1f80717e936b836e6b7189d98e88c58915494f8e74d3af27b4a0811e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.06137",
    "kind": "arxiv",
    "version": 2
  }
}