Pith Number

pith:EBEZVLU5

pith:2014:EBEZVLU5H5CTWSVIMDZLGDR2KF

not attested not anchored not stored refs pending

Parameter estimation for an expanding universe

Heng Fan, Jieci Wang, Jiliang Jing, Zehua Tian

arxiv:1401.1932 v4 · 2014-01-09 · quant-ph · 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{EBEZVLU5H5CTWSVIMDZLGDR2KF}

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	2026-05-18T02:28:13.429647Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20499aae9d3f453b4aa860f2b30e3a51621797875c54a1c00d0bcc986305c2cb

Aliases

arxiv: 1401.1932 · arxiv_version: 1401.1932v4 · doi: 10.48550/arxiv.1401.1932 · pith_short_12: EBEZVLU5H5CT · pith_short_16: EBEZVLU5H5CTWSVI · pith_short_8: EBEZVLU5

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/EBEZVLU5H5CTWSVIMDZLGDR2KF \
  | 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: 20499aae9d3f453b4aa860f2b30e3a51621797875c54a1c00d0bcc986305c2cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f73e62d16607dc53d1845b812ba7d2f716663c4dbd0397d6a6e2fae6864bb5a9",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2014-01-09T09:19:02Z",
    "title_canon_sha256": "b2185805992be2e637131fc227478accc8687b733a02c79c6dcd3fc92a36299a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.1932",
    "kind": "arxiv",
    "version": 4
  }
}