Pith Number

pith:2VGLPVO2

pith:2026:2VGLPVO2PAP7UBWLTXFTGYELRX

not attested not anchored not stored refs pending

De mora luminis: Roemer's discovery 350 years later

Fabio Falchi, Maurizio Francesio, Paolo Gattillo, Riccardo Furgoni

arxiv:2607.28512 v1 · 2026-07-30 · physics.hist-ph · astro-ph.IM · physics.class-ph · physics.ed-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{2VGLPVO2PAP7UBWLTXFTGYELRX}

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	2026-07-31T01:38:20.545269Z
Builder	pith-number-builder-2026-05-17-v1
Signature	unsigned_v0
Schema	pith-number/v1.0

Canonical hash

d54cb7d5da781ffa06cb9dcb33608b8dd21e070b11a5288d3d5e6db035808f6b

Aliases

arxiv: 2607.28512 · arxiv_version: 2607.28512v1 · doi: 10.48550/arxiv.2607.28512 · pith_short_12: 2VGLPVO2PAP7 · pith_short_16: 2VGLPVO2PAP7UBWL · pith_short_8: 2VGLPVO2

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/2VGLPVO2PAP7UBWLTXFTGYELRX \
  | 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: d54cb7d5da781ffa06cb9dcb33608b8dd21e070b11a5288d3d5e6db035808f6b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ebd81a01a85d8a24bd970e65f16305219714bfacc0ac5fe31c0e43e583d28050",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "physics.class-ph",
      "physics.ed-ph"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2026-07-30T16:50:35Z",
    "title_canon_sha256": "f06870222599144ed05d4c909369fb1fd8b8c00ab8e0c021ad132092c36063fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.28512",
    "kind": "arxiv",
    "version": 1
  }
}