Pith Number

pith:54UUCAFZ

pith:2013:54UUCAFZYXRTIRV6DYTBWRZAEO

not attested not anchored not stored refs pending

A phenomenological approach to the evolution of galaxies

Alvio Renzini, Marcella Carollo, Simon Lilly, Ying-jie Peng

arxiv:1302.4450 v1 · 2013-02-18 · 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{54UUCAFZYXRTIRV6DYTBWRZAEO}

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	2026-05-18T01:51:35.500510Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef294100b9c5e33446be1e261b4720238f053b1cd0088ae5dfb8d857e1b9fe6d

Aliases

arxiv: 1302.4450 · arxiv_version: 1302.4450v1 · doi: 10.48550/arxiv.1302.4450 · pith_short_12: 54UUCAFZYXRT · pith_short_16: 54UUCAFZYXRTIRV6 · pith_short_8: 54UUCAFZ

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/54UUCAFZYXRTIRV6DYTBWRZAEO \
  | 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: ef294100b9c5e33446be1e261b4720238f053b1cd0088ae5dfb8d857e1b9fe6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d03b954fd5778a60c618da71246d3eb6ff0f45d52db8b59354b1d917b6acf380",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-02-18T21:00:06Z",
    "title_canon_sha256": "97b47ff7db86746b0099fc8e09048cd9fa553dcd5a98dd740613a05b966c45c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.4450",
    "kind": "arxiv",
    "version": 1
  }
}