Pith Number

pith:QMPY7RR2

pith:2013:QMPY7RR23AC6BV2K3ROUAZGJQ6

not attested not anchored not stored refs pending

Star Formation in the First Galaxies - II: Clustered Star Formation and the Influence of Metal Line Cooling

Chalence Safranek-Shrader, Milos Milosavljevic, Volker Bromm

arxiv:1307.1982 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{QMPY7RR23AC6BV2K3ROUAZGJQ6}

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	2026-05-18T01:48:58.840835Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

831f8fc63ad805e0d74adc5d4064c98784ea28d19a5beb8aecd9c25c19f27992

Aliases

arxiv: 1307.1982 · arxiv_version: 1307.1982v2 · doi: 10.48550/arxiv.1307.1982 · pith_short_12: QMPY7RR23AC6 · pith_short_16: QMPY7RR23AC6BV2K · pith_short_8: QMPY7RR2

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/QMPY7RR23AC6BV2K3ROUAZGJQ6 \
  | 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: 831f8fc63ad805e0d74adc5d4064c98784ea28d19a5beb8aecd9c25c19f27992

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd29ae5f52316ef0ce0602d5543d70f544c3d8bdbe438924ba759f74d25223e0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-07-08T08:52:34Z",
    "title_canon_sha256": "6f37d24b1d313d41c641efccb7d2f502f2def6f69675fb6363b4aa1e04b31f05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.1982",
    "kind": "arxiv",
    "version": 2
  }
}