Pith Number

pith:SHGCDQHK

pith:2019:SHGCDQHKSDX4QDMWDXMJGRJLGW

not attested not anchored not stored refs pending

Spiral arm formation mechanisms: Spiral Structure in Barred galaxies. Observational constraints to spiral arm formation mechanisms

Joan Font, John E. Beckman, Panos A. Patsis, Phil A. James

arxiv:1901.04725 v1 · 2019-01-15 · 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{SHGCDQHKSDX4QDMWDXMJGRJLGW}

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	2026-05-17T23:55:52.710723Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

91cc21c0ea90efc80d961dd893452b35a5798a62074a88275c645fdf5d794b4f

Aliases

arxiv: 1901.04725 · arxiv_version: 1901.04725v1 · doi: 10.48550/arxiv.1901.04725 · pith_short_12: SHGCDQHKSDX4 · pith_short_16: SHGCDQHKSDX4QDMW · pith_short_8: SHGCDQHK

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/SHGCDQHKSDX4QDMWDXMJGRJLGW \
  | 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: 91cc21c0ea90efc80d961dd893452b35a5798a62074a88275c645fdf5d794b4f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2c8d4080e917d98c422495d6ded4a18a127d1c89bf0515e7ca773691cd14250",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-01-15T09:22:17Z",
    "title_canon_sha256": "8e1a3bfb7136cca219e4588bbca124d0d906301911be1637aebe3abfabb40232"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.04725",
    "kind": "arxiv",
    "version": 1
  }
}