Pith Number

pith:NQXMIPLC

pith:2020:NQXMIPLCZFMIMS2ZGJVJYCNTPT

not attested not anchored not stored refs pending

Traversable wormholes with vanishing sound speed in $f(R)$ gravity

Lorenza Mauro, Orlando Luongo, Salvatore Capozziello

arxiv:2012.13908 v1 · 2020-12-27 · gr-qc · astro-ph.HE · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NQXMIPLCZFMIMS2ZGJVJYCNTPT}

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	2026-07-05T02:02:13.837047Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c2ec43d62c958864b59326a9c09b37cef2f13ca983a9eeb83e84a1b550b64f2

Aliases

arxiv: 2012.13908 · arxiv_version: 2012.13908v1 · doi: 10.48550/arxiv.2012.13908 · pith_short_12: NQXMIPLCZFMI · pith_short_16: NQXMIPLCZFMIMS2Z · pith_short_8: NQXMIPLC

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/NQXMIPLCZFMIMS2ZGJVJYCNTPT \
  | 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: 6c2ec43d62c958864b59326a9c09b37cef2f13ca983a9eeb83e84a1b550b64f2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aead7286aac29d0a17c4a94f23a0165ad750ebf6f247fc0ffe1cb8a48479a060",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2020-12-27T10:39:45Z",
    "title_canon_sha256": "d1b59f44a9b92ee61a213499917a1887836a9afadfe9774fb9b0b71095c73a6f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.13908",
    "kind": "arxiv",
    "version": 1
  }
}