Pith Number

pith:42J5J2XW

pith:2017:42J5J2XWGPZ2JNJEJV4A4BFSFV

not attested not anchored not stored refs pending

A Study of the Time Evolution of Brans-Dicke Parameter and its Role in Cosmic Expansion

Soumyadip Chowdhury, Sudipto Roy

arxiv:1704.03454 v3 · 2017-04-11 · 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{42J5J2XWGPZ2JNJEJV4A4BFSFV}

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	2026-05-18T00:41:53.007112Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e693d4eaf633f3a4b5244d780e04b22d690f74690cb653df1cc3d691baa41bad

Aliases

arxiv: 1704.03454 · arxiv_version: 1704.03454v3 · doi: 10.48550/arxiv.1704.03454 · pith_short_12: 42J5J2XWGPZ2 · pith_short_16: 42J5J2XWGPZ2JNJE · pith_short_8: 42J5J2XW

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/42J5J2XWGPZ2JNJEJV4A4BFSFV \
  | 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: e693d4eaf633f3a4b5244d780e04b22d690f74690cb653df1cc3d691baa41bad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "58daf19eb34359bf47d13ff07b09755baa7df838b19c38ef98208fdf6baf42dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2017-04-11T02:03:53Z",
    "title_canon_sha256": "947db20ed418943ae96a1574933d05dd04e7b8f7fe5a722e25a7c4b4c8149959"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.03454",
    "kind": "arxiv",
    "version": 3
  }
}