Pith Number

pith:EC4NIREQ

pith:1999:EC4NIREQATYUUVQ4WD7VCYSZZS

not attested not anchored not stored refs pending

On local and global measurements of the speed of light on rotating platforms

A. Tartaglia (Dip. Fisica del Politecnico, G. Rizzi, Italy), Turin

arxiv:gr-qc/9904028 v1 · 1999-04-12 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EC4NIREQATYUUVQ4WD7VCYSZZS}

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	2026-07-04T14:26:16.110912Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20b8d4449004f14a561cb0ff516259ccbe99e76bd24ce749b148377b30e45554

Aliases

arxiv: gr-qc/9904028 · arxiv_version: gr-qc/9904028v1 · doi: 10.48550/arxiv.gr-qc/9904028 · pith_short_12: EC4NIREQATYU · pith_short_16: EC4NIREQATYUUVQ4 · pith_short_8: EC4NIREQ

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/EC4NIREQATYUUVQ4WD7VCYSZZS \
  | 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: 20b8d4449004f14a561cb0ff516259ccbe99e76bd24ce749b148377b30e45554

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2af312851b6d2bd6cc3a532a2fb07a6bdfa79bdfa30e11c0c3351cc34c18e0cb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1999-04-12T14:13:52Z",
    "title_canon_sha256": "bcc8f57f923127099e39907aafb8c817b9f9d19fb53dbfdf1bbf3994386b9af9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9904028",
    "kind": "arxiv",
    "version": 1
  }
}