Pith Number

pith:2TMTEXVN

pith:2010:2TMTEXVNXFNTXQD2M4CFPNUA2E

not attested not anchored not stored refs pending

A modern Fizeau experiment for education and outreach purposes

Adrien Sell\'e (PIIM), Didier Guyomarc'H (PIIM), Jean-Marie Laugier (PIIM), Martina Knoop (PIIM), Olivier Morizot (PIIM), Sandrine Ferri (PIIM)

arxiv:1011.1770 v1 · 2010-11-08 · physics.atom-ph · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2TMTEXVNXFNTXQD2M4CFPNUA2E}

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	2026-05-18T02:04:50.456290Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4d9325eadb95b3bc07a670457b680d1088a0fe3dfad08bb3b0d464b760bad19

Aliases

arxiv: 1011.1770 · arxiv_version: 1011.1770v1 · doi: 10.48550/arxiv.1011.1770 · pith_short_12: 2TMTEXVNXFNT · pith_short_16: 2TMTEXVNXFNTXQD2 · pith_short_8: 2TMTEXVN

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/2TMTEXVNXFNTXQD2M4CFPNUA2E \
  | 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: d4d9325eadb95b3bc07a670457b680d1088a0fe3dfad08bb3b0d464b760bad19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "153200f5ec9e185feedec51c95cc10c538618072ea99b92770870bf118901a71",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2010-11-08T11:01:55Z",
    "title_canon_sha256": "bf65deba0c531b7fdf602da06b4ee73bd1d1138bc1f01ada8318f42448702071"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.1770",
    "kind": "arxiv",
    "version": 1
  }
}