Pith Number

pith:SUUP4YQD

pith:2017:SUUP4YQDKDRAA54EB4HLKGDFFQ

not attested not anchored not stored refs pending

Lah numbers and Lindstr\"om's lemma

Ivica Martinjak, Riste \v{S}krekovski

arxiv:1711.04547 v1 · 2017-11-13 · 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{SUUP4YQDKDRAA54EB4HLKGDFFQ}

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	2026-05-18T00:30:36.377443Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9528fe620350e20077840f0eb518652c365924824f17d1d9db15a439aff868cc

Aliases

arxiv: 1711.04547 · arxiv_version: 1711.04547v1 · doi: 10.48550/arxiv.1711.04547 · pith_short_12: SUUP4YQDKDRA · pith_short_16: SUUP4YQDKDRAA54E · pith_short_8: SUUP4YQD

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/SUUP4YQDKDRAA54EB4HLKGDFFQ \
  | 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: 9528fe620350e20077840f0eb518652c365924824f17d1d9db15a439aff868cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20b40da29ed1f7bdef85623c458a6930ce75a16d585db6afcfa346cef7fbc7f6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-11-13T12:15:25Z",
    "title_canon_sha256": "007aebafa15cda0482b9069321e50127dfbd3659513bf85748b079966b79b507"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.04547",
    "kind": "arxiv",
    "version": 1
  }
}