Pith Number

pith:U44FSW5W

pith:2010:U44FSW5WEKXPGCCKVBMW7TTKXF

not attested not anchored not stored refs pending

The zero exemplar distance problem

Minghui Jiang

arxiv:1003.1991 v4 · 2010-03-09 · cs.CC · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U44FSW5WEKXPGCCKVBMW7TTKXF}

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	2026-05-18T02:08:35.723013Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a738595bb622aef3084aa8596fce6ab97b644abfca06b0eb9c41fbdaa2e884fb

Aliases

arxiv: 1003.1991 · arxiv_version: 1003.1991v4 · doi: 10.48550/arxiv.1003.1991 · pith_short_12: U44FSW5WEKXP · pith_short_16: U44FSW5WEKXPGCCK · pith_short_8: U44FSW5W

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/U44FSW5WEKXPGCCKVBMW7TTKXF \
  | 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: a738595bb622aef3084aa8596fce6ab97b644abfca06b0eb9c41fbdaa2e884fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11de3caeba57a1bd7525d92a56e8d0506ae5bc79f191247dcd38fe3660f350e6",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2010-03-09T22:25:13Z",
    "title_canon_sha256": "be6db006466e5ae809e121a4b8e3abb295996cb3098040d39f7fb752c30991e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1003.1991",
    "kind": "arxiv",
    "version": 4
  }
}