Pith Number

pith:LI6ZOGR3

pith:2019:LI6ZOGR37DRCNSRRC33TE6N3AC

not attested not anchored not stored refs pending

Frequency variation for in vacuo photon propagation in the Standard-Model Extension

Alessandro D.A.M. Spallicci, Jos\'e A. Helay\"el-Neto

arxiv:1904.11035 v2 · 2019-04-24 · hep-ph · astro-ph.CO · 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{LI6ZOGR37DRCNSRRC33TE6N3AC}

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	2026-05-17T23:40:38.821003Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5a3d971a3bf8e226ca3116f73279bb008ec8cba34139e3e18702ddded145f6f0

Aliases

arxiv: 1904.11035 · arxiv_version: 1904.11035v2 · doi: 10.48550/arxiv.1904.11035 · pith_short_12: LI6ZOGR37DRC · pith_short_16: LI6ZOGR37DRCNSRR · pith_short_8: LI6ZOGR3

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/LI6ZOGR37DRCNSRRC33TE6N3AC \
  | 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: 5a3d971a3bf8e226ca3116f73279bb008ec8cba34139e3e18702ddded145f6f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c2e1dece3cb8272b14037bca0ffe5c1baa48e70e433e2d6a85e5a2b5016b6db",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2019-04-24T19:38:17Z",
    "title_canon_sha256": "49d360dbc5bebbf0ce1df7da94978241883c36057a3fae23ae534bf5aa0c5aef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.11035",
    "kind": "arxiv",
    "version": 2
  }
}