Pith Number

pith:FCAOGDM3

pith:2017:FCAOGDM32MOOCBSAYIZBK52VHH

not attested not anchored not stored refs pending

Spiral arms and disc stability in the Andromeda galaxy

2), (2) University of Tartu, 3) ((1) Tartu Observatory, (3) Leibniz-Institut fur Astrophysik Potsdam, Antti Tamm (1), Elmo Tempel (1, Estonia, Germany), Peeter Tenjes (1, Rain Kipper (1), Taavi Tuvikene (1)

arxiv:1701.05815 v2 · 2017-01-20 · 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{FCAOGDM32MOOCBSAYIZBK52VHH}

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	2026-05-18T00:47:48.337383Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2880e30d9bd31ce10640c23215775539cf6f38a18056a3c6d08fdf3d04af12c9

Aliases

arxiv: 1701.05815 · arxiv_version: 1701.05815v2 · doi: 10.48550/arxiv.1701.05815 · pith_short_12: FCAOGDM32MOO · pith_short_16: FCAOGDM32MOOCBSA · pith_short_8: FCAOGDM3

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/FCAOGDM32MOOCBSAYIZBK52VHH \
  | 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: 2880e30d9bd31ce10640c23215775539cf6f38a18056a3c6d08fdf3d04af12c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "758554c33ae245cd00a5ce076718126263f7922bb8ba5a2a86a45256584869b5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-01-20T14:49:01Z",
    "title_canon_sha256": "1b3cfba15df383b560988238d07edde6df33232e01762d2619a818970185bc27"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.05815",
    "kind": "arxiv",
    "version": 2
  }
}