Pith Number

pith:CYHJMXDW

pith:2013:CYHJMXDWZO6HOJHFNFVWBTK5KA

not attested not anchored not stored refs pending

On the galaxy spiral arms' nature as revealed by rotation frequencies

B\'arbara Pichardo, Francesca Figueras, Hector Vel\'azquez, Merc\`e Romero-G\'omez, Octavio Valenzuela, Santi Roca-F\`abrega, Teresa Antoja

arxiv:1302.6981 v2 · 2013-02-27 · 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{CYHJMXDWZO6HOJHFNFVWBTK5KA}

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	2026-05-18T03:27:42.535418Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

160e965c76cbbc7724e5696b60cd5d500e513480019790c8533230ec955ea589

Aliases

arxiv: 1302.6981 · arxiv_version: 1302.6981v2 · doi: 10.48550/arxiv.1302.6981 · pith_short_12: CYHJMXDWZO6H · pith_short_16: CYHJMXDWZO6HOJHF · pith_short_8: CYHJMXDW

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/CYHJMXDWZO6HOJHFNFVWBTK5KA \
  | 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: 160e965c76cbbc7724e5696b60cd5d500e513480019790c8533230ec955ea589

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0bf320abb1b3da8d28ecb66d313635045ea5f6ab27921f9b106fe3d36735efc1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-02-27T20:21:24Z",
    "title_canon_sha256": "ad7399d98c931628831746026b5e9b771e908ec83fbc7a793ce6017203cea657"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.6981",
    "kind": "arxiv",
    "version": 2
  }
}