Pith Number

pith:QRQRXVQ5

pith:2012:QRQRXVQ5I6S5RRWZFFB2V3YNRH

not attested not anchored not stored refs pending

Two Hands Are Better Than One (up to constant factors)

Andrew Winslow, Erik D. Demaine, Martin L. Demaine, Matthew J. Patitz, Robert Schweller, Sarah Cannon, Sarah Eisenstat, Scott M. Summers

arxiv:1201.1650 v1 · 2012-01-08 · cs.CC · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QRQRXVQ5I6S5RRWZFFB2V3YNRH}

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	2026-05-18T02:21:18.713956Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84611bd61d47a5d8c6d92943aaef0d89d5447981eb6e63220c434672d3795148

Aliases

arxiv: 1201.1650 · arxiv_version: 1201.1650v1 · doi: 10.48550/arxiv.1201.1650 · pith_short_12: QRQRXVQ5I6S5 · pith_short_16: QRQRXVQ5I6S5RRWZ · pith_short_8: QRQRXVQ5

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/QRQRXVQ5I6S5RRWZFFB2V3YNRH \
  | 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: 84611bd61d47a5d8c6d92943aaef0d89d5447981eb6e63220c434672d3795148

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7059667f2e8b105dd65483e8dfdf6a8b4b21550217e4627d957e46ebc4a081bd",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2012-01-08T18:51:32Z",
    "title_canon_sha256": "025dd642f5535056e9c1b44e21d3c068b914671d7ecab17cb68b77818c8bb4ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.1650",
    "kind": "arxiv",
    "version": 1
  }
}