Pith Number

pith:64SB4JWS

pith:2026:64SB4JWSKO5QT4JF63XTWVH45M

not attested not anchored not stored refs pending

Relativity for Retired Engineers

David Garfinkle

arxiv:2605.21660 v1 · 2026-05-20 · 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{64SB4JWSKO5QT4JF63XTWVH45M}

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	2026-05-22T01:03:27.126132Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7241e26d253bb09f125f6ef3b54fceb386f1d209b5a7d1b2a999be77d1ef792

Aliases

arxiv: 2605.21660 · arxiv_version: 2605.21660v1 · doi: 10.48550/arxiv.2605.21660 · pith_short_12: 64SB4JWSKO5Q · pith_short_16: 64SB4JWSKO5QT4JF · pith_short_8: 64SB4JWS

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/64SB4JWSKO5QT4JF63XTWVH45M \
  | 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: f7241e26d253bb09f125f6ef3b54fceb386f1d209b5a7d1b2a999be77d1ef792

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2895f268977eaf59b3044f04adc36c8683da959ea0b99720582048dfbd71fcea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2026-05-20T19:13:01Z",
    "title_canon_sha256": "414c2db065310fc41934ee81cb8044931da9c9f4fdc5d0a1e457573f0888e23c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.21660",
    "kind": "arxiv",
    "version": 1
  }
}