Pith Number

pith:QRY5F72U

pith:2012:QRY5F72UH5GLH26ONLGSUDLNJX

not attested not anchored not stored refs pending

Revisiting a model-independent dark energy reconstruction method

Irene Sendra, Ruth Lazkoz, Vincenzo Salzano

arxiv:1202.4689 v1 · 2012-02-21 · 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{QRY5F72UH5GLH26ONLGSUDLNJX}

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	2026-05-18T03:43:18.395053Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8471d2ff543f4cb3ebce6acd2a0d6d4dc274201177c96e85ff1e9b21a6718a4b

Aliases

arxiv: 1202.4689 · arxiv_version: 1202.4689v1 · doi: 10.48550/arxiv.1202.4689 · pith_short_12: QRY5F72UH5GL · pith_short_16: QRY5F72UH5GLH26O · pith_short_8: QRY5F72U

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/QRY5F72UH5GLH26ONLGSUDLNJX \
  | 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: 8471d2ff543f4cb3ebce6acd2a0d6d4dc274201177c96e85ff1e9b21a6718a4b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "66dcc80f9eeedbd61073c06651e004ff7d2732e7a669acb49655f00ac2fe7441",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-02-21T16:16:09Z",
    "title_canon_sha256": "20e7cb70cbe2d6d473eae0f1492be1d8b8a55754cef6e7029b5ff445fe4c0ab1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.4689",
    "kind": "arxiv",
    "version": 1
  }
}