Pith Number

pith:RLGE4ZKF

pith:2011:RLGE4ZKFLC7F32ZNWICMEWBLHA

not attested not anchored not stored refs pending

Archimedes' calculations of square roots

E. B. Davies

arxiv:1101.0492 v1 · 2011-01-03 · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RLGE4ZKFLC7F32ZNWICMEWBLHA}

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	2026-05-18T04:32:10.297374Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8acc4e654558be5deb2db204c2582b3830f3829cb06ca8b51d79ecf1eb808b49

Aliases

arxiv: 1101.0492 · arxiv_version: 1101.0492v1 · doi: 10.48550/arxiv.1101.0492 · pith_short_12: RLGE4ZKFLC7F · pith_short_16: RLGE4ZKFLC7F32ZN · pith_short_8: RLGE4ZKF

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/RLGE4ZKFLC7F32ZNWICMEWBLHA \
  | 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: 8acc4e654558be5deb2db204c2582b3830f3829cb06ca8b51d79ecf1eb808b49

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "986937c2b4cfd43e19fa3a60067eb20b199b118d937cfa2193f6d50272848715",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2011-01-03T11:22:43Z",
    "title_canon_sha256": "a562ed10c7e1c6c97a9c64b24b21bf6d07b3130a55ac2de62bc160ee43e2bf2d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.0492",
    "kind": "arxiv",
    "version": 1
  }
}