Pith Number

pith:2ZDNUWPU

pith:2009:2ZDNUWPU3AXLUXRSAI5DPLZCQL

not attested not anchored not stored refs pending

Cosmic microwave background with Brans-Dicke gravity II: constraints with the WMAP and SDSS data

Fengquan Wu, Xuelei Chen

arxiv:0903.0385 v3 · 2009-03-02 · astro-ph.CO · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2ZDNUWPU3AXLUXRSAI5DPLZCQL}

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	2026-05-18T02:35:00.684242Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d646da59f4d82eba5e32023a37af2282cb39f7eb4c37b4ea097beace154af6ef

Aliases

arxiv: 0903.0385 · arxiv_version: 0903.0385v3 · doi: 10.48550/arxiv.0903.0385 · pith_short_12: 2ZDNUWPU3AXL · pith_short_16: 2ZDNUWPU3AXLUXRS · pith_short_8: 2ZDNUWPU

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/2ZDNUWPU3AXLUXRSAI5DPLZCQL \
  | 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: d646da59f4d82eba5e32023a37af2282cb39f7eb4c37b4ea097beace154af6ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61d8fc6f2035ce08d3938970b482de2a733c6cd3105260fdc94d7d75c26f6784",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-02T21:48:35Z",
    "title_canon_sha256": "c9d3e1bdca79061da9c036ddce86428bac80b20ec4804a604ffcf0906ec59e39"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.0385",
    "kind": "arxiv",
    "version": 3
  }
}