Pith Number

pith:MZ4M2BXY

pith:2013:MZ4M2BXYZYIWKLQQOXTLNYZ5RC

not attested not anchored not stored refs pending

On the index of Simon's congruence for piecewise testability

Manfred Kufleitner, Philippe Schnoebelen, Prateek Karandikar

arxiv:1310.1278 v5 · 2013-10-03 · cs.FL · cs.DM · 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{MZ4M2BXYZYIWKLQQOXTLNYZ5RC}

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	2026-05-18T01:11:27.677126Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6678cd06f8ce11652e1075e6b6e33d88a45811e68fae53bb3ddd68b6693679bc

Aliases

arxiv: 1310.1278 · arxiv_version: 1310.1278v5 · doi: 10.48550/arxiv.1310.1278 · pith_short_12: MZ4M2BXYZYIW · pith_short_16: MZ4M2BXYZYIWKLQQ · pith_short_8: MZ4M2BXY

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/MZ4M2BXYZYIWKLQQOXTLNYZ5RC \
  | 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: 6678cd06f8ce11652e1075e6b6e33d88a45811e68fae53bb3ddd68b6693679bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b06a5c499a46cbe3eb24eed0046acb5431ec883d1277f72390885db71cf92c76",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2013-10-03T19:07:10Z",
    "title_canon_sha256": "397349ffa9aa2458fe80670fa1de8647f230de32522fc56d0ff4f25516063bdd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.1278",
    "kind": "arxiv",
    "version": 5
  }
}