Pith Number

pith:NOA4U7A7

pith:2018:NOA4U7A7F2R6IUC3FAYFR7CJWK

not attested not anchored not stored refs pending

The fate of formamide in a fragmenting protoplanetary disc

Cassandra Hall, David Qu\'enard, Duncan H. Forgan, Izaskun Jim\'enez-Serra, John D. Ilee, Ken Rice

arxiv:1809.09900 v1 · 2018-09-26 · 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{NOA4U7A7F2R6IUC3FAYFR7CJWK}

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	2026-05-17T23:59:49.565476Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b81ca7c1f2ea3e4505b283058fc49b28ac17ba74483bbfe16fe7322fa438519

Aliases

arxiv: 1809.09900 · arxiv_version: 1809.09900v1 · doi: 10.48550/arxiv.1809.09900 · pith_short_12: NOA4U7A7F2R6 · pith_short_16: NOA4U7A7F2R6IUC3 · pith_short_8: NOA4U7A7

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/NOA4U7A7F2R6IUC3FAYFR7CJWK \
  | 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: 6b81ca7c1f2ea3e4505b283058fc49b28ac17ba74483bbfe16fe7322fa438519

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "041d72e6e2c99ecfd0b041f7f8eacf9fb404f97b2560d5f428982cee9c36fb44",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-09-26T10:49:27Z",
    "title_canon_sha256": "db77856e85c6d47c9a587f1f01d554a802c45252a6bab083525904529ed21735"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.09900",
    "kind": "arxiv",
    "version": 1
  }
}