Pith Number

pith:ZRDLEKAQ

pith:2008:ZRDLEKAQRP4VC6NFQOEVZQZSHO

not attested not anchored not stored refs pending

Spiral density wave triggering of star formation in SA and SAB galaxies

CRyA, Eric E. Mart\'inez-Garc\'ia (1), Gustavo Bruzual-A. (2) ((1) UNAM, M\'exico; (2) CIDA, Rosa Amelia Gonz\'alez-L\'opezlira (1), Venezuela)

arxiv:0812.3647 v1 · 2008-12-18 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZRDLEKAQRP4VC6NFQOEVZQZSHO}

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	2026-05-18T04:29:24.360640Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc46b228108bf95179a583895cc3323b932a49ca7a82b85480b84226d2da0c43

Aliases

arxiv: 0812.3647 · arxiv_version: 0812.3647v1 · doi: 10.48550/arxiv.0812.3647 · pith_short_12: ZRDLEKAQRP4V · pith_short_16: ZRDLEKAQRP4VC6NF · pith_short_8: ZRDLEKAQ

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/ZRDLEKAQRP4VC6NFQOEVZQZSHO \
  | 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: cc46b228108bf95179a583895cc3323b932a49ca7a82b85480b84226d2da0c43

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48fbd9608891b0fea5b5c7944aa13468f8d3ca2823c38f4cd951e09ca5ca4d1a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-12-18T20:13:14Z",
    "title_canon_sha256": "b6219ee3d615e33029fb4d8e7b83dac799dd9d0bb4ed37bd9233ef109f0aaf1b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.3647",
    "kind": "arxiv",
    "version": 1
  }
}