Pith Number

pith:WDEYWC7Z

pith:2011:WDEYWC7Z5ECJSH6RCCEOXLJHLE

not attested not anchored not stored refs pending

Reconstructing the intergalactic UV background with QSO absorption lines

Cora Fechner

arxiv:1106.2821 v1 · 2011-06-14 · 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{WDEYWC7Z5ECJSH6RCCEOXLJHLE}

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	2026-05-18T02:01:37.226658Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0c98b0bf9e904991fd11088ebad275909f7bea60ec18e415d35e3ed5d2a9c99

Aliases

arxiv: 1106.2821 · arxiv_version: 1106.2821v1 · doi: 10.48550/arxiv.1106.2821 · pith_short_12: WDEYWC7Z5ECJ · pith_short_16: WDEYWC7Z5ECJSH6R · pith_short_8: WDEYWC7Z

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/WDEYWC7Z5ECJSH6RCCEOXLJHLE \
  | 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: b0c98b0bf9e904991fd11088ebad275909f7bea60ec18e415d35e3ed5d2a9c99

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4826ad37ebd691640f98b4798639764b7f125e950d2fca7d1dfae85a2286816a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-06-14T20:37:33Z",
    "title_canon_sha256": "fa7c452b1fc6a2a7fbd50d6a592dfd1417072de3d9dd78e2835bc04961e29ee9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.2821",
    "kind": "arxiv",
    "version": 1
  }
}