Pith Number

pith:FRZ4Z2YZ

pith:2025:FRZ4Z2YZJH5MZ65NSVTR2AVQWZ

not attested not anchored not stored refs pending

Galileo Galilei and Satellite Navigation

Alessandro de Angelis

arxiv:2501.15884 v1 · 2025-01-27 · physics.hist-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{FRZ4Z2YZJH5MZ65NSVTR2AVQWZ}

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	2026-07-05T10:05:51.572869Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c73cceb1949faccfbad95671d02b0b64d03d98636f8eb5e460f42b48b37c7ab

Aliases

arxiv: 2501.15884 · arxiv_version: 2501.15884v1 · doi: 10.48550/arxiv.2501.15884 · pith_short_12: FRZ4Z2YZJH5M · pith_short_16: FRZ4Z2YZJH5MZ65N · pith_short_8: FRZ4Z2YZ

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/FRZ4Z2YZJH5MZ65NSVTR2AVQWZ \
  | 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: 2c73cceb1949faccfbad95671d02b0b64d03d98636f8eb5e460f42b48b37c7ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a3fca7e71a8d271c98fc862e90c7bf4eb05526cea5e553b6df4a1655db87dc9",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2025-01-27T09:14:01Z",
    "title_canon_sha256": "49127c8e890c6bf93c31b08b68d32b8d3ddb0fb9751e9725c900a511187574d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.15884",
    "kind": "arxiv",
    "version": 1
  }
}