Pith Number

pith:XUKXYAQS

pith:2008:XUKXYAQSFNN33F5KXG5YU23CPV

not attested not anchored not stored refs pending

GZK photon constraints on Planck scale Lorentz violation in QED

Luca Maccione (SISSA & INFN, Stefano Liberati (SISSA & INFN, Trieste)

arxiv:0805.2548 v2 · 2008-05-16 · astro-ph · gr-qc · hep-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XUKXYAQSFNN33F5KXG5YU23CPV}

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	2026-05-18T04:18:24.600980Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd157c02122b5bbd97aab9bb8a6b627d6b01bfa0c1a771e8df0105132cd29ea5

Aliases

arxiv: 0805.2548 · arxiv_version: 0805.2548v2 · doi: 10.48550/arxiv.0805.2548 · pith_short_12: XUKXYAQSFNN3 · pith_short_16: XUKXYAQSFNN33F5K · pith_short_8: XUKXYAQS

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/XUKXYAQSFNN33F5KXG5YU23CPV \
  | 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: bd157c02122b5bbd97aab9bb8a6b627d6b01bfa0c1a771e8df0105132cd29ea5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6afa52c8a5f2545ee8342e27de0842e29c8acef7b6a96be05471493a40177b95",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-05-16T14:30:58Z",
    "title_canon_sha256": "23b35167924774056e637f616033d2ee5b6472b6146ea3163311b86abc98ec70"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0805.2548",
    "kind": "arxiv",
    "version": 2
  }
}