Pith Number

pith:RK7YD6BX

pith:2009:RK7YD6BXDWWLQX7FNFMQG3OWBP

not attested not anchored not stored refs pending

Forming Planetesimals in Solar and Extrasolar Nebulae

A. Youdin (CITA), E. Chiang (UC Berkeley)

arxiv:0909.2652 v2 · 2009-09-14 · astro-ph.EP · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RK7YD6BXDWWLQX7FNFMQG3OWBP}

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	2026-05-18T02:11:47.930351Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8abf81f8371dacb85fe56959036dd60bc63cef107571daf340960b905c18e1ae

Aliases

arxiv: 0909.2652 · arxiv_version: 0909.2652v2 · doi: 10.48550/arxiv.0909.2652 · pith_short_12: RK7YD6BXDWWL · pith_short_16: RK7YD6BXDWWLQX7F · pith_short_8: RK7YD6BX

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/RK7YD6BXDWWLQX7FNFMQG3OWBP \
  | 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: 8abf81f8371dacb85fe56959036dd60bc63cef107571daf340960b905c18e1ae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ccabdaf2d0d811ffeb0f6b12c6f76433c91507c96f3eaa6e0cd280dd458965a6",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-09-14T20:12:00Z",
    "title_canon_sha256": "3d2601484181c5c29a64682ed638cbf8cae479143aa206473a58e1b3390e5d3a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2652",
    "kind": "arxiv",
    "version": 2
  }
}