Pith Number

pith:R3CTM7OH

pith:2009:R3CTM7OHMNJ6PZVHODYV6CXYPQ

not attested not anchored not stored refs pending

Discriminating Between the Physical Processes that Drive Spheroid Size Evolution

(2) CfA), Kevin Bundy (1), Lars Hernquist (2), Philip F. Hopkins (1), Stijn Wuyts (2), Thomas J. Cox (2) ((1) Berkeley

arxiv:0909.2039 v2 · 2009-09-10 · astro-ph.CO · 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{R3CTM7OHMNJ6PZVHODYV6CXYPQ}

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	2026-05-18T02:11:57.302021Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8ec5367dc76353e7e6a770f15f0af87c285c7c8b80ef3e8a30734fa363abe471

Aliases

arxiv: 0909.2039 · arxiv_version: 0909.2039v2 · doi: 10.48550/arxiv.0909.2039 · pith_short_12: R3CTM7OHMNJ6 · pith_short_16: R3CTM7OHMNJ6PZVH · pith_short_8: R3CTM7OH

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/R3CTM7OHMNJ6PZVHODYV6CXYPQ \
  | 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: 8ec5367dc76353e7e6a770f15f0af87c285c7c8b80ef3e8a30734fa363abe471

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1019b1d3e783114b24e49417c9b70982ddd2843b16f936156fecbafea26af527",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-10T20:02:18Z",
    "title_canon_sha256": "8898e92b03b04fdc4ed7519623d097343879156e17a196e7c02462437d542981"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2039",
    "kind": "arxiv",
    "version": 2
  }
}