Pith Number

pith:Z3I7P3Q4

pith:2019:Z3I7P3Q4XNKFZT4YRWB3NHSBIZ

not attested not anchored not stored refs pending

High density of active galactic nuclei in the outskirts of distant galaxy clusters

E. Koulouridis, I. Bartalucci

arxiv:1903.02919 v1 · 2019-03-07 · astro-ph.GA · 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{Z3I7P3Q4XNKFZT4YRWB3NHSBIZ}

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	2026-05-17T23:50:55.244992Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ced1f7ee1cbb545ccf988d83b69e41464cf1d393b9a53f1eb24c2f1a025066f3

Aliases

arxiv: 1903.02919 · arxiv_version: 1903.02919v1 · doi: 10.48550/arxiv.1903.02919 · pith_short_12: Z3I7P3Q4XNKF · pith_short_16: Z3I7P3Q4XNKFZT4Y · pith_short_8: Z3I7P3Q4

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/Z3I7P3Q4XNKFZT4YRWB3NHSBIZ \
  | 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: ced1f7ee1cbb545ccf988d83b69e41464cf1d393b9a53f1eb24c2f1a025066f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "35fe9c10c281da740818641300ae20968836fd987a4437bb52cca442ab41e4e6",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-03-07T14:02:20Z",
    "title_canon_sha256": "1fa5b93f7f17ea368a14f46feba2774fd6748732ba8e0659de359efd1f3677bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.02919",
    "kind": "arxiv",
    "version": 1
  }
}