Pith Number

pith:QQ4U6GMZ

pith:2011:QQ4U6GMZGLJVVW52FALK7FI3SD

not attested not anchored not stored refs pending

Chemical history of molecules in circumstellar disks

2), (2) Leiden Observatory, 3), (3) MPE Garching, (4) Denison Univ.), Ewine F. van Dishoeck (2, Ruud Visser (1, Steven D. Doty (4) ((1) Univ. of Michigan

arxiv:1107.2075 v1 · 2011-07-11 · 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{QQ4U6GMZGLJVVW52FALK7FI3SD}

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	2026-05-18T02:01:20.240401Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84394f199932d35adbba2816af951b90fda68bc52c0b1c81d616c506bfe23f24

Aliases

arxiv: 1107.2075 · arxiv_version: 1107.2075v1 · doi: 10.48550/arxiv.1107.2075 · pith_short_12: QQ4U6GMZGLJV · pith_short_16: QQ4U6GMZGLJVVW52 · pith_short_8: QQ4U6GMZ

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/QQ4U6GMZGLJVVW52FALK7FI3SD \
  | 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: 84394f199932d35adbba2816af951b90fda68bc52c0b1c81d616c506bfe23f24

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf40d66d917d417ad1850f856075918aafa0dd0061c5498a92dce239d259e9e0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-07-11T16:52:15Z",
    "title_canon_sha256": "9e7c1052677a8a23f2a76f137e539137c9b6974dfca81ac7fcfd8be148539f9f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.2075",
    "kind": "arxiv",
    "version": 1
  }
}