Pith Number

pith:76H6JWDW

pith:2019:76H6JWDW4CIYQWQCD3Y2QUUNRG

not attested not anchored not stored refs pending

On the physical (im)possibility of lightsabers

Francois Fillion-Gourdeau, Jean-Sebastien Gagnon

arxiv:1906.02575 v1 · 2019-06-06 · physics.pop-ph · physics.ed-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{76H6JWDW4CIYQWQCD3Y2QUUNRG}

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	2026-05-17T23:44:00.728963Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff8fe4d876e091885a021ef1a8528d89a2144428c4334427783243da9cbe20e1

Aliases

arxiv: 1906.02575 · arxiv_version: 1906.02575v1 · doi: 10.48550/arxiv.1906.02575 · pith_short_12: 76H6JWDW4CIY · pith_short_16: 76H6JWDW4CIYQWQC · pith_short_8: 76H6JWDW

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/76H6JWDW4CIYQWQCD3Y2QUUNRG \
  | 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: ff8fe4d876e091885a021ef1a8528d89a2144428c4334427783243da9cbe20e1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a66bd9188b9c038e66dae0ec84844e43fc9fe90d3ccf7dec211ca70be99d4912",
    "cross_cats_sorted": [
      "physics.ed-ph",
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2019-06-06T13:31:13Z",
    "title_canon_sha256": "b7a90353da0818b5ff583e16b8bb5f70c2e1247a8e679d3505eb0679d07182cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.02575",
    "kind": "arxiv",
    "version": 1
  }
}