Pith Number

pith:LJSJJ3ZW

pith:2013:LJSJJ3ZW5HIKM7RBGKPQ3IMHXF

not attested not anchored not stored refs pending

Solution to the Proton Radius Problem

D. Robson

arxiv:1305.4552 v8 · 2013-05-20 · nucl-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LJSJJ3ZW5HIKM7RBGKPQ3IMHXF}

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	2026-05-18T02:28:40.924538Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5a6494ef36e9d0a67e21329f0da187b975e1779b5a78070ac2d00eac6c8e778b

Aliases

arxiv: 1305.4552 · arxiv_version: 1305.4552v8 · doi: 10.48550/arxiv.1305.4552 · pith_short_12: LJSJJ3ZW5HIK · pith_short_16: LJSJJ3ZW5HIKM7RB · pith_short_8: LJSJJ3ZW

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/LJSJJ3ZW5HIKM7RBGKPQ3IMHXF \
  | 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: 5a6494ef36e9d0a67e21329f0da187b975e1779b5a78070ac2d00eac6c8e778b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "790adfb23cab7be1728e7dc7bbb902b8b72ea957cb1c56395a206f6c16f0c681",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nucl-th",
    "submitted_at": "2013-05-20T15:18:55Z",
    "title_canon_sha256": "230701ff3f1c8f3bfcaebe5c43c8dee8d8e2f0565c7764bbba6173492b55e324"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.4552",
    "kind": "arxiv",
    "version": 8
  }
}