Pith Number

pith:TILMB7ZP

pith:2009:TILMB7ZPEFFF42PERMR4XRE3ST

not attested not anchored not stored refs pending

A simple model to link the properties of quasars to the properties of dark matter halos out to high redshift

Darren J. Croton

arxiv:0901.4104 v1 · 2009-01-26 · 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{TILMB7ZPEFFF42PERMR4XRE3ST}

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	2026-05-18T02:35:06.210044Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9a16c0ff2f214a5e69e48b23cbc49b94cc72022ca34836824321db8924649ec0

Aliases

arxiv: 0901.4104 · arxiv_version: 0901.4104v1 · doi: 10.48550/arxiv.0901.4104 · pith_short_12: TILMB7ZPEFFF · pith_short_16: TILMB7ZPEFFF42PE · pith_short_8: TILMB7ZP

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/TILMB7ZPEFFF42PERMR4XRE3ST \
  | 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: 9a16c0ff2f214a5e69e48b23cbc49b94cc72022ca34836824321db8924649ec0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54efb7a88b5d6be9023aba2cd1e2096259832323162f92b700c95d4061563156",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-01-26T21:08:52Z",
    "title_canon_sha256": "3f05e034116d4106383690498e5f52b7dfe6ee2d18da3f9532281c7d3123a363"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4104",
    "kind": "arxiv",
    "version": 1
  }
}