Pith Number

pith:MCHM4CUR

pith:2021:MCHM4CURPAE4QZNHX57C7JSSNN

not attested not anchored not stored refs pending

New Constraints on Lorentz Invariance Violation from Combined Linear and Circular Optical Polarimetry of Extragalactic Sources

Fabian Kislat, Praneet Bhoj, Roman Gerasimov

arxiv:2104.00238 v2 · 2021-04-01 · astro-ph.CO · astro-ph.HE · 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{MCHM4CURPAE4QZNHX57C7JSSNN}

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	2026-07-05T02:42:30.010881Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

608ece0a917809c865a7bf7e2fa6526b70f15c4c87af3ff3aac3ffe7b9792862

Aliases

arxiv: 2104.00238 · arxiv_version: 2104.00238v2 · doi: 10.48550/arxiv.2104.00238 · pith_short_12: MCHM4CURPAE4 · pith_short_16: MCHM4CURPAE4QZNH · pith_short_8: MCHM4CUR

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/MCHM4CURPAE4QZNHX57C7JSSNN \
  | 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: 608ece0a917809c865a7bf7e2fa6526b70f15c4c87af3ff3aac3ffe7b9792862

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48d116f28a57b841cb015ed304ecc1e01c71d22b1bae7770a8f023d7b5905ba4",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "hep-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2021-04-01T03:48:50Z",
    "title_canon_sha256": "effe3479fb780334eaeee1a68ae0457555f14bb206d5c6ad0d7b9aef71d5d0c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.00238",
    "kind": "arxiv",
    "version": 2
  }
}