Pith Number

pith:Z6ZNZ4IX

pith:2026:Z6ZNZ4IXI33UTDQFDNTJVN53AR

not attested not anchored not stored refs pending

Hunting the first Cosmic Giants: formation and detectability of Direct Collapse Black Holes around high-redshift quasars

Alessandro Lupi, Alessandro Trinca, Marta Volonteri, Raffaella Schneider, Roberto Decarli, Rosa Valiante, Zolt\'an Haiman

arxiv:2601.14370 v2 · 2026-01-20 · 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{Z6ZNZ4IXI33UTDQFDNTJVN53AR}

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	2026-07-24T01:23:04.069417Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cfb2dcf11746f7498e051b669ab7bb0446bb1a46f23982ad1b212668de47a5df

Aliases

arxiv: 2601.14370 · arxiv_version: 2601.14370v2 · doi: 10.48550/arxiv.2601.14370 · pith_short_12: Z6ZNZ4IXI33U · pith_short_16: Z6ZNZ4IXI33UTDQF · pith_short_8: Z6ZNZ4IX

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/Z6ZNZ4IXI33UTDQFDNTJVN53AR \
  | 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: cfb2dcf11746f7498e051b669ab7bb0446bb1a46f23982ad1b212668de47a5df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e503c56cdb4b9fdfde6b57ae0fd635fbac2f3fcc7b2eca808e420dc3d878724",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-01-20T19:00:02Z",
    "title_canon_sha256": "0d72577a6c52b37a3992a9df32c6bc447b5c3898b2c987185ebd381a274f721b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.14370",
    "kind": "arxiv",
    "version": 2
  }
}