Pith Number

pith:SDQ7BJUA

pith:2018:SDQ7BJUAAPSV7PHX4RK527KB4A

not attested not anchored not stored refs pending

Angular momentum transfer in primordial discs and the rotation of the first stars

Shingo Hirano, Volker Bromm

arxiv:1802.07279 v1 · 2018-02-20 · 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{SDQ7BJUAAPSV7PHX4RK527KB4A}

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	2026-05-18T00:21:19.548144Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90e1f0a68003e55fbcf7e455dd7d41e004ccb3ef544612d7d24f14c05d0b3032

Aliases

arxiv: 1802.07279 · arxiv_version: 1802.07279v1 · doi: 10.48550/arxiv.1802.07279 · pith_short_12: SDQ7BJUAAPSV · pith_short_16: SDQ7BJUAAPSV7PHX · pith_short_8: SDQ7BJUA

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/SDQ7BJUAAPSV7PHX4RK527KB4A \
  | 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: 90e1f0a68003e55fbcf7e455dd7d41e004ccb3ef544612d7d24f14c05d0b3032

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4c829f7a9f9722277bf2aa8edf7b4f8315a41402d41c91e2107dc9259db153f6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-02-20T19:00:40Z",
    "title_canon_sha256": "0fd94914db9b816eba9ff5113dd622cb6a51bf95e073d00a24c7caca433c7bbf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.07279",
    "kind": "arxiv",
    "version": 1
  }
}