Pith Number

pith:KL7QV2Q6

pith:2009:KL7QV2Q6F2HCZSGM6WFTD6DD22

not attested not anchored not stored refs pending

The universe is accelerating. Do we need a new mass scale?

Federico Piazza, Savvas Nesseris, Shinji Tsujikawa

arxiv:0910.3949 v2 · 2009-10-20 · astro-ph.CO · gr-qc · hep-ph · hep-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KL7QV2Q6F2HCZSGM6WFTD6DD22}

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	2026-05-18T02:34:18.016106Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

52ff0aea1e2e8e2cc8ccf58b31f863d6a0b01fe6187aaea2f8d64e5a0d45ca51

Aliases

arxiv: 0910.3949 · arxiv_version: 0910.3949v2 · doi: 10.48550/arxiv.0910.3949 · pith_short_12: KL7QV2Q6F2HC · pith_short_16: KL7QV2Q6F2HCZSGM · pith_short_8: KL7QV2Q6

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/KL7QV2Q6F2HCZSGM6WFTD6DD22 \
  | 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: 52ff0aea1e2e8e2cc8ccf58b31f863d6a0b01fe6187aaea2f8d64e5a0d45ca51

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90099555c8188cd92b73b7df8ee3a7e44db5385cc3ea5a98b1cef5362977a7fc",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-20T20:00:12Z",
    "title_canon_sha256": "9f839eed775d26c9fd2f9d71f765dbc46f61b580fd02ea5cf8b92316938dfbe2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.3949",
    "kind": "arxiv",
    "version": 2
  }
}