Pith Number

pith:J7ZWK4D4

pith:2009:J7ZWK4D42HE7E6LLLA7L5X2DLH

not attested not anchored not stored refs pending

Future dark energy constraints from measurements of quasar parallax: Gaia, SIM and beyond

CMU), Fiona Ding (McWilliams Center for Cosmology, Rupert A.C. Croft (McWilliams Center for Cosmology

arxiv:0903.3402 v2 · 2009-03-19 · 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{J7ZWK4D42HE7E6LLLA7L5X2DLH}

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	2026-05-18T02:14:27.214402Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ff365707cd1c9f2796b583ebedf4359d04d9103516cd5046845f064b9b9d8e9

Aliases

arxiv: 0903.3402 · arxiv_version: 0903.3402v2 · doi: 10.48550/arxiv.0903.3402 · pith_short_12: J7ZWK4D42HE7 · pith_short_16: J7ZWK4D42HE7E6LL · pith_short_8: J7ZWK4D4

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/J7ZWK4D42HE7E6LLLA7L5X2DLH \
  | 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: 4ff365707cd1c9f2796b583ebedf4359d04d9103516cd5046845f064b9b9d8e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37423420ab3e808850b0955f4b8fd42d0308bc2e77d6fd1abaed46563fbc3aed",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-19T20:00:02Z",
    "title_canon_sha256": "ae25ccacf54a558a00ce9232e076522c4d25c6d2d6d33cb4c54919a43cf36b8f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.3402",
    "kind": "arxiv",
    "version": 2
  }
}