Pith Number

pith:PQYQSGV7

pith:2011:PQYQSGV7JFUFFI6JYRNWVC3LF6

not attested not anchored not stored refs pending

Age patterns in a sample of nearby spiral galaxies

D.Heath Jones, Emilio J. Alfaro, Enrique P\'erez, John O'Byrne, Joss Bland-Hawthorn, M. Carmen S\'anchez-Gil

arxiv:1103.4147 v1 · 2011-03-21 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PQYQSGV7JFUFFI6JYRNWVC3LF6}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T04:26:21.458190Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c31091abf496852a3c9c45b6a8b6b2fb8ac6f9c427731f226ecb0e766225c7d

Aliases

arxiv: 1103.4147 · arxiv_version: 1103.4147v1 · doi: 10.48550/arxiv.1103.4147 · pith_short_12: PQYQSGV7JFUF · pith_short_16: PQYQSGV7JFUFFI6J · pith_short_8: PQYQSGV7

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/PQYQSGV7JFUFFI6JYRNWVC3LF6 \
  | 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: 7c31091abf496852a3c9c45b6a8b6b2fb8ac6f9c427731f226ecb0e766225c7d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b13d230d5752c473776a379f886303b14ca60a6a4bfeba27529a522feab0c9e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-03-21T20:46:16Z",
    "title_canon_sha256": "1145901af2a334e880406bbe20341d78115d0d7357e006b7622bf2d74f33a0ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.4147",
    "kind": "arxiv",
    "version": 1
  }
}