Pith Number

pith:UIZW3YKP

pith:2015:UIZW3YKPNFNZZ7YYEI6ZUAW3NH

not attested not anchored not stored refs pending

Optimal non-adaptive solutions for the counterfeit coin problem

C. Thach Nguyen

arxiv:1502.04896 v1 · 2015-02-17 · cs.DM · 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{UIZW3YKPNFNZZ7YYEI6ZUAW3NH}

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	2026-05-18T02:26:45.010699Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2336de14f695b9cff18223d9a02db69d86f8de82cc8a14306ee9c0ea49da3c3

Aliases

arxiv: 1502.04896 · arxiv_version: 1502.04896v1 · doi: 10.48550/arxiv.1502.04896 · pith_short_12: UIZW3YKPNFNZ · pith_short_16: UIZW3YKPNFNZZ7YY · pith_short_8: UIZW3YKP

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/UIZW3YKPNFNZZ7YYEI6ZUAW3NH \
  | 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: a2336de14f695b9cff18223d9a02db69d86f8de82cc8a14306ee9c0ea49da3c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88814fb92724b6bd9182dd360d48f9898782d57cf69b3777263719d8c983307b",
    "cross_cats_sorted": [
      "math.HO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2015-02-17T14:02:45Z",
    "title_canon_sha256": "72c04c2f30682798eee4b6ae9cb9de68fae2a127d8d7ac7def876443f2558bfa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.04896",
    "kind": "arxiv",
    "version": 1
  }
}