Pith Number

pith:M6H7YDGM

pith:2011:M6H7YDGMAEEMR6BVTGRD7XTQE3

not attested not anchored not stored refs pending

On the invariance of the speed of light

Gautam Mukhopadhyay, Harihar Behera

arxiv:1111.6516 v1 · 2011-11-28 · physics.pop-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{M6H7YDGMAEEMR6BVTGRD7XTQE3}

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	2026-05-18T04:07:29.740425Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

678ffc0ccc0108c8f83599a23fde7026d7188caff3e83d78d259c6ea0e48edff

Aliases

arxiv: 1111.6516 · arxiv_version: 1111.6516v1 · doi: 10.48550/arxiv.1111.6516 · pith_short_12: M6H7YDGMAEEM · pith_short_16: M6H7YDGMAEEMR6BV · pith_short_8: M6H7YDGM

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/M6H7YDGMAEEMR6BVTGRD7XTQE3 \
  | 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: 678ffc0ccc0108c8f83599a23fde7026d7188caff3e83d78d259c6ea0e48edff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "787872666e37336818c6ffd67e3d9b0d2fc3845484aadf1c5a60dde88e40ba0c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2011-11-28T17:08:55Z",
    "title_canon_sha256": "e4293b5177a464de51f8c582507cc1634ff74f95f6ed5be7f409d4ad38cefc97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.6516",
    "kind": "arxiv",
    "version": 1
  }
}