Pith Number

pith:PZ2WFZQ5

pith:2016:PZ2WFZQ5YPZZVOLFZNUZDQVDGB

not attested not anchored not stored refs pending

Large scale opacity fluctuations in the Lyman alpha forest: evidence for QSOs dominating the ionising UV background at z ~ 5.5-6 ?

Ewald Puchwein, Jonathan Chardin, Martin G. Haehnelt

arxiv:1606.08231 v2 · 2016-06-27 · 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{PZ2WFZQ5YPZZVOLFZNUZDQVDGB}

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	2026-05-18T00:48:28.219164Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e7562e61dc3f39ab965cb6991c2a3307a450bf89f1200882343d5af28ffeb3c

Aliases

arxiv: 1606.08231 · arxiv_version: 1606.08231v2 · doi: 10.48550/arxiv.1606.08231 · pith_short_12: PZ2WFZQ5YPZZ · pith_short_16: PZ2WFZQ5YPZZVOLF · pith_short_8: PZ2WFZQ5

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/PZ2WFZQ5YPZZVOLFZNUZDQVDGB \
  | 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: 7e7562e61dc3f39ab965cb6991c2a3307a450bf89f1200882343d5af28ffeb3c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "542109b5d0ea3ac5af3e0128b0386c7fec7cbe8cacd07ffe5b4b0beea4c9e524",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2016-06-27T12:12:40Z",
    "title_canon_sha256": "f39a7c74fdeb3a7a1ad2199b4754579f825c846747de52c323b7bfe7ce3adcd4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.08231",
    "kind": "arxiv",
    "version": 2
  }
}