Pith Number

pith:COZLJMV6

pith:2014:COZLJMV6BCV446LE2MRQ2Q6GQ2

not attested not anchored not stored refs pending

Higher derivative corrections of $f(R)$ gravity with varying equation of state in the case of variable $G$ and $\Lambda$

A. Pasqua, B. Pourhassan, M. Khurshudyan

arxiv:1401.6630 v4 · 2014-01-26 · 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{COZLJMV6BCV446LE2MRQ2Q6GQ2}

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	2026-05-18T02:19:36.275075Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

13b2b4b2be08abce7964d3230d43c68681d18f5b9410cff7f048a5fae6415861

Aliases

arxiv: 1401.6630 · arxiv_version: 1401.6630v4 · doi: 10.48550/arxiv.1401.6630 · pith_short_12: COZLJMV6BCV4 · pith_short_16: COZLJMV6BCV446LE · pith_short_8: COZLJMV6

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/COZLJMV6BCV446LE2MRQ2Q6GQ2 \
  | 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: 13b2b4b2be08abce7964d3230d43c68681d18f5b9410cff7f048a5fae6415861

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9c3f034117a34f361cd8c7c7e9b5380e741b9107145cc86c2a929b658a9ae6b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2014-01-26T08:58:25Z",
    "title_canon_sha256": "0037c6e7a99b813706b442f0387b9b5f67c55de6663dbe81c71cb7239a5ed6fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.6630",
    "kind": "arxiv",
    "version": 4
  }
}