Pith Number

pith:WECSHCZF

pith:2009:WECSHCZFGUT52JP4BOHAE4OQAB

not attested not anchored not stored refs pending

Constraints on dark energy evolution

A. Blanchard, A. Riazuelo, L.D. Ferramacho, Y.Zolnierowski

arxiv:0909.1703 v2 · 2009-09-09 · 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{WECSHCZFGUT52JP4BOHAE4OQAB}

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	2026-05-18T02:11:58.042242Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b105238b253527dd25fc0b8e0271d0004d889cdc26d49f7fdac224bc8108d901

Aliases

arxiv: 0909.1703 · arxiv_version: 0909.1703v2 · doi: 10.48550/arxiv.0909.1703 · pith_short_12: WECSHCZFGUT5 · pith_short_16: WECSHCZFGUT52JP4 · pith_short_8: WECSHCZF

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/WECSHCZFGUT52JP4BOHAE4OQAB \
  | 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: b105238b253527dd25fc0b8e0271d0004d889cdc26d49f7fdac224bc8108d901

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1941cc6871779b59d4ffaf676a821ad5801cbb19cc05bafe56bc0f18d373e6a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-09T13:19:01Z",
    "title_canon_sha256": "9e5b178b5d16ac17fef534a8701e05de79f71c400b8f645d5174befb9051999e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1703",
    "kind": "arxiv",
    "version": 2
  }
}