Pith Number

pith:YLZLZI5P

pith:2009:YLZLZI5PKINALC5SRSBGZVVVOS

not attested not anchored not stored refs pending

Sizes and ages of SDSS ellipticals: Comparison with hierarchical galaxy formation models

2-U. Bologna, 3-UPENN, 4-U. Michigan), Federico Marulli (2), Francesco Shankar (1), Joseph B. Hyde (3), Mariangela Bernardi (3), Ravi K. Sheth (3) (1-MPA, Xinyu Dai (4)

arxiv:0912.0012 v1 · 2009-11-30 · 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{YLZLZI5PKINALC5SRSBGZVVVOS}

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	2026-05-18T02:10:35.394962Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c2f2bca3af521a058bb28c826cd6b5749cd69931e54759ab725c1b87c57c7a09

Aliases

arxiv: 0912.0012 · arxiv_version: 0912.0012v1 · doi: 10.48550/arxiv.0912.0012 · pith_short_12: YLZLZI5PKINA · pith_short_16: YLZLZI5PKINALC5S · pith_short_8: YLZLZI5P

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/YLZLZI5PKINALC5SRSBGZVVVOS \
  | 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: c2f2bca3af521a058bb28c826cd6b5749cd69931e54759ab725c1b87c57c7a09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5138e7ede8f9063da0479320745b4b92f0ec00e15dafa9838db976432689aa9d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-11-30T21:05:58Z",
    "title_canon_sha256": "18dc4ebe998ddbd2a9e2d630f7c7b24dd4da5c179103307caecaeae3e9e828fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0012",
    "kind": "arxiv",
    "version": 1
  }
}