Pith Number

pith:PQ4I7AKQ

pith:2003:PQ4I7AKQHF2OTJ7NCRKDFH25QH

not attested not anchored not stored refs pending

The bispectrum of the Lyman-alpha forest at z~2-2.4 from a Large sample of UVES QSO Absorption Spectra (LUQAS)

A. Heavens, L. Hernquist, M.G. Haehnelt, M. Viel, S. Matarrese, T.-S. Kim, V. Springel

arxiv:astro-ph/0308151 v2 · 2003-08-11 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PQ4I7AKQHF2OTJ7NCRKDFH25QH}

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.

Cited by

2 papers in Pith

Machine Learning Techniques for Astrophysics and Cosmology: Lyman-$\alpha$ forest

Lya2pcf: an efficient pipeline to estimate two- and three-point correlation functions of the Lyman-$\alpha$ forest

Receipt and verification

First computed	2026-07-04T16:51:26.751938Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c388f81503974e9a7ed1454329f5d81f6612ad201f71cadc4431b20a8ac3f96

Aliases

arxiv: astro-ph/0308151 · arxiv_version: astro-ph/0308151v2 · doi: 10.48550/arxiv.astro-ph/0308151 · pith_short_12: PQ4I7AKQHF2O · pith_short_16: PQ4I7AKQHF2OTJ7N · pith_short_8: PQ4I7AKQ

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/PQ4I7AKQHF2OTJ7NCRKDFH25QH \
  | 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: 7c388f81503974e9a7ed1454329f5d81f6612ad201f71cadc4431b20a8ac3f96

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc8c7b773a329703a63f64ac7dd9dcbd36c76f50293a400353521295715ba3ca",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-08-11T09:41:02Z",
    "title_canon_sha256": "6287fd159e1f2fab6dd0b478baa9a9d3133f795726f4a101db871838f4befc5e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0308151",
    "kind": "arxiv",
    "version": 2
  }
}