Pith Number

pith:NHJEXBWX

pith:2018:NHJEXBWXK2YEIPJ5YD3CAZ5YXM

not attested not anchored not stored refs pending

Projective symmetries and induced electromagnetism in metric-affine gravity

Alejandro Jimenez-Cano, Bert Janssen

arxiv:1807.10168 v2 · 2018-07-26 · gr-qc · hep-th · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NHJEXBWXK2YEIPJ5YD3CAZ5YXM}

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	2026-05-18T00:01:53.018169Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69d24b86d756b0443d3dc0f62067b8bb359e61397dece58811cfb545d76a8830

Aliases

arxiv: 1807.10168 · arxiv_version: 1807.10168v2 · doi: 10.48550/arxiv.1807.10168 · pith_short_12: NHJEXBWXK2YE · pith_short_16: NHJEXBWXK2YEIPJ5 · pith_short_8: NHJEXBWX

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/NHJEXBWXK2YEIPJ5YD3CAZ5YXM \
  | 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: 69d24b86d756b0443d3dc0f62067b8bb359e61397dece58811cfb545d76a8830

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9781c4793d8b7257a1b06b3565ee63ef81e3164d28dc86b1ed4cf32f7a70129d",
    "cross_cats_sorted": [
      "hep-th",
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-07-26T14:33:40Z",
    "title_canon_sha256": "7a075b626c167d656f88332da24dd2b44451fb4702110050fb23bdcc41bff3ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.10168",
    "kind": "arxiv",
    "version": 2
  }
}