Pith Number

pith:PFTPVQVS

pith:2009:PFTPVQVSP6IEZ5P6WOPUCVBHPI

not attested not anchored not stored refs pending

Particle-accelerator constraints on isotropic modifications of the speed of light

David F. Phillips, Michael A. Hohensee, Ralf Lehnert, Ronald L. Walsworth

arxiv:0904.2031 v1 · 2009-04-13 · 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{PFTPVQVSP6IEZ5P6WOPUCVBHPI}

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	2026-05-18T02:34:59.776894Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7966fac2b27f904cf5feb39f4154277a1325adb4a7b2104e1690aa7be0fad46d

Aliases

arxiv: 0904.2031 · arxiv_version: 0904.2031v1 · doi: 10.48550/arxiv.0904.2031 · pith_short_12: PFTPVQVSP6IE · pith_short_16: PFTPVQVSP6IEZ5P6 · pith_short_8: PFTPVQVS

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/PFTPVQVSP6IEZ5P6WOPUCVBHPI \
  | 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: 7966fac2b27f904cf5feb39f4154277a1325adb4a7b2104e1690aa7be0fad46d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1a9c8a73895e7ccb8237c19e20b9f2bfd78903cbaf0c25487c88849401ed3ab",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2009-04-13T23:44:35Z",
    "title_canon_sha256": "04d75fc1d9bfda1f1250d15ff6a491a106c8e0e5c33a58c763d2ce8aa3c6fe70"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2031",
    "kind": "arxiv",
    "version": 1
  }
}