Pith Number

pith:SPZ2B2FG

pith:2013:SPZ2B2FGN3PGDL5WMRGPZQALCC

not attested not anchored not stored refs pending

Formation, orbital and thermal evolution, and survival of planetary-mass clumps in the early phase of circumstellar disk evolution

Masahiro N. Machida, Shuichiro Inutsuka, Yusuke Tsukamoto

arxiv:1307.6910 v3 · 2013-07-26 · astro-ph.SR · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SPZ2B2FGN3PGDL5WMRGPZQALCC}

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	2026-05-18T01:48:34.374245Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93f3a0e8a66ede61afb6644cfcc00b10a252e7b5a3969fe2857f1de7333d5172

Aliases

arxiv: 1307.6910 · arxiv_version: 1307.6910v3 · doi: 10.48550/arxiv.1307.6910 · pith_short_12: SPZ2B2FGN3PG · pith_short_16: SPZ2B2FGN3PGDL5W · pith_short_8: SPZ2B2FG

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/SPZ2B2FGN3PGDL5WMRGPZQALCC \
  | 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: 93f3a0e8a66ede61afb6644cfcc00b10a252e7b5a3969fe2857f1de7333d5172

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dc64c62fef4de16d0eae865484e3844dd2796ddea4a94a9992951f609c5b28d",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-07-26T02:14:25Z",
    "title_canon_sha256": "412b663f5701abf74adde4a8ac7fdc3279607fe36a68c9d1a60e82256c9bf6dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.6910",
    "kind": "arxiv",
    "version": 3
  }
}