Pith Number

pith:YJJCQ643

pith:2018:YJJCQ643MMHCFGJUEOHM36OQXQ

not attested not anchored not stored refs pending

$f(R)$ quantum cosmology: avoiding the Big Rip

Ana Alonso-Serrano, Mariam Bouhmadi-Lopez, Prado Martin-Moruno

arxiv:1802.03290 v2 · 2018-02-09 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YJJCQ643MMHCFGJUEOHM36OQXQ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:00:57.464501Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c252287b9b630e229934238ecdf9d0bc1ee0d402ff9ae5ff99e26e167a9a9c16

Aliases

arxiv: 1802.03290 · arxiv_version: 1802.03290v2 · doi: 10.48550/arxiv.1802.03290 · pith_short_12: YJJCQ643MMHC · pith_short_16: YJJCQ643MMHCFGJU · pith_short_8: YJJCQ643

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/YJJCQ643MMHCFGJUEOHM36OQXQ \
  | 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: c252287b9b630e229934238ecdf9d0bc1ee0d402ff9ae5ff99e26e167a9a9c16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b9c6b13308f4d376e88bd723c1ad54f5b88dd13904f7c893f6a630ac27d722f0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-02-09T14:53:29Z",
    "title_canon_sha256": "e7cf8cdbab01ce43bddec367f627a652da042321eac9212154489cb489df7658"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03290",
    "kind": "arxiv",
    "version": 2
  }
}