Pith Number

pith:YMDRA7ML

pith:2016:YMDRA7MLTWJ6TQJ7BRQSASTEIP

not attested not anchored not stored refs pending

Tidal origin of spiral arms in galaxies orbiting a cluster

Andres del Pino, Ewa L. Lokas, Marcin Semczuk

arxiv:1608.03441 v2 · 2016-08-11 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YMDRA7MLTWJ6TQJ7BRQSASTEIP}

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	2026-05-18T00:53:59.364694Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c307107d8b9d93e9c13f0c61204a6443fc9fa94d6fd1494b4044913364bed0ec

Aliases

arxiv: 1608.03441 · arxiv_version: 1608.03441v2 · doi: 10.48550/arxiv.1608.03441 · pith_short_12: YMDRA7MLTWJ6 · pith_short_16: YMDRA7MLTWJ6TQJ7 · pith_short_8: YMDRA7ML

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/YMDRA7MLTWJ6TQJ7BRQSASTEIP \
  | 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: c307107d8b9d93e9c13f0c61204a6443fc9fa94d6fd1494b4044913364bed0ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "928c763592c5f22fede176d649cf0028dbf47db71426ed969f853c15ffbd5188",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-08-11T12:50:29Z",
    "title_canon_sha256": "81e745a6961459ab5711b62e74318f2a407d63cfc9ed4feabf825969c822f6e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.03441",
    "kind": "arxiv",
    "version": 2
  }
}