Pith Number

pith:MQY2CDVQ

pith:2003:MQY2CDVQURV3X7IG3RLRDVJVSV

not attested not anchored not stored refs pending

On 3+1 Dimensional Friedman-Robertson-Walker Universes with Matter

C. Helias, G.O. Papadopoulos, I.G. Kevrekidis, P.G. Kevrekidis, T. Christodoulakis

arxiv:gr-qc/0302120 v1 · 2003-02-28 · 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{MQY2CDVQURV3X7IG3RLRDVJVSV}

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.

Cited by

1 paper in Pith

Non-linear Schr\"{o}dinger-type formulation of scalar field cosmology: two barotropic fluids and exact solutions

Receipt and verification

First computed	2026-07-04T14:25:39.456697Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6431a10eb0a46bbbfd06dc5711d535955202b86732d3338e78b8de99c8d0d1ff

Aliases

arxiv: gr-qc/0302120 · arxiv_version: gr-qc/0302120v1 · doi: 10.48550/arxiv.gr-qc/0302120 · pith_short_12: MQY2CDVQURV3 · pith_short_16: MQY2CDVQURV3X7IG · pith_short_8: MQY2CDVQ

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/MQY2CDVQURV3X7IG3RLRDVJVSV \
  | 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: 6431a10eb0a46bbbfd06dc5711d535955202b86732d3338e78b8de99c8d0d1ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e015e7c9ca7bff910b75a79b9bb9125fea219ca2a468d589dd18531b18d7782",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2003-02-28T12:55:31Z",
    "title_canon_sha256": "ab0deb8d3ea7fb844e6e2ad83363c36e5c0ff0b559533554591d26efa952c791"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0302120",
    "kind": "arxiv",
    "version": 1
  }
}