Pith Number

pith:VQSAHOY3

pith:2013:VQSAHOY3TZ5NAKNR5NW3OMJVFI

not attested not anchored not stored refs pending

The evolution of HI and CIV quasar absorption line systems at 1.9 < z < 3.2

2), (2) Department of Astronomy, Adrian M. Partl (1), Cambridge, Germany, Madingley Road, Robert F. Carswell (3), Tae-Sun Kim (1, UK), University of Wisconsin-Madison, Volker M\"uller (1) ((1) Leibniz-Institut f\"ur Astrophysik Potsdam, WI (3) Institute of Astronomy

arxiv:1302.6622 v1 · 2013-02-26 · 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{VQSAHOY3TZ5NAKNR5NW3OMJVFI}

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

1 paper in Pith

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

Receipt and verification

First computed	2026-05-18T01:51:26.957865Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac2403bb1b9e7ad029b1eb6db731352a0315189c7c6aec0a0c93df4a2672d882

Aliases

arxiv: 1302.6622 · arxiv_version: 1302.6622v1 · doi: 10.48550/arxiv.1302.6622 · pith_short_12: VQSAHOY3TZ5N · pith_short_16: VQSAHOY3TZ5NAKNR · pith_short_8: VQSAHOY3

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/VQSAHOY3TZ5NAKNR5NW3OMJVFI \
  | 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: ac2403bb1b9e7ad029b1eb6db731352a0315189c7c6aec0a0c93df4a2672d882

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e49a29bb11e4166eb5ae0911f78a555b8d88138b664526957a5b7f11db08aac",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-02-26T22:58:10Z",
    "title_canon_sha256": "b9e908d0b5d25e7f0334f03db6ca17b9f04ee7a9f5e423d011a6de44cd7eb88c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.6622",
    "kind": "arxiv",
    "version": 1
  }
}