Pith Number

pith:SL4WEAU5

pith:2013:SL4WEAU5FE2NCEUNMXRR6PBH3O

not attested not anchored not stored refs pending

Wormholes and Time-Machines in Nonminimally Coupled Matter-Curvature Theories of Gravity

Orfeu Bertolami, Ricardo Zambujal Ferreira

arxiv:1302.7125 v1 · 2013-02-28 · hep-th · astro-ph.CO · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SL4WEAU5FE2NCEUNMXRR6PBH3O}

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	2026-05-18T03:09:22.419027Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

92f962029d2934d1128d65e31f3c27db8819881b1276c5d047ef156a8b5cd279

Aliases

arxiv: 1302.7125 · arxiv_version: 1302.7125v1 · doi: 10.48550/arxiv.1302.7125 · pith_short_12: SL4WEAU5FE2N · pith_short_16: SL4WEAU5FE2NCEUN · pith_short_8: SL4WEAU5

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/SL4WEAU5FE2NCEUNMXRR6PBH3O \
  | 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: 92f962029d2934d1128d65e31f3c27db8819881b1276c5d047ef156a8b5cd279

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d78aed409581216722abddd335932a351fb6ab3649df17cbbf41cd046a84c989",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2013-02-28T09:49:56Z",
    "title_canon_sha256": "fe2a3a3277d6de881674f40e3d0fec6356ca85b5b1164d6775fdb476ade5155d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.7125",
    "kind": "arxiv",
    "version": 1
  }
}