Pith Number

pith:PWYDJGR6

pith:2009:PWYDJGR6M377RWK5MFQRJTG5F5

not attested not anchored not stored refs pending

SPIDER II - The Fundamental Plane of Early-type Galaxies in grizYJHK

F. La Barbera, I.G. de la Rosa, P.A.A. Lopes, R.R. de Carvalho

arxiv:0912.4558 v2 · 2009-12-23 · 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{PWYDJGR6M377RWK5MFQRJTG5F5}

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	2026-05-18T02:10:14.371538Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7db0349a3e66fff8d95d616114ccdd2f717be875897a3d5734e0b24e31965e29

Aliases

arxiv: 0912.4558 · arxiv_version: 0912.4558v2 · doi: 10.48550/arxiv.0912.4558 · pith_short_12: PWYDJGR6M377 · pith_short_16: PWYDJGR6M377RWK5 · pith_short_8: PWYDJGR6

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/PWYDJGR6M377RWK5MFQRJTG5F5 \
  | 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: 7db0349a3e66fff8d95d616114ccdd2f717be875897a3d5734e0b24e31965e29

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "990c27f614b6d12c26e8c528bc2d06e1557286864733d403e5754eaa5be5df62",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-23T03:09:50Z",
    "title_canon_sha256": "c04cb4ddf16af29f7341cef9a502655e7020714484a77f8f15605f7b1e88e0f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.4558",
    "kind": "arxiv",
    "version": 2
  }
}