Pith Number

pith:OYSU7AMP

pith:2018:OYSU7AMPPAOJMIBQ5G2EKAX2QW

not attested not anchored not stored refs pending

Beating Fredman-Koml\'{o}s for perfect $k$-hashing

Andrii Riazanov, Venkatesan Guruswami

arxiv:1805.04151 v1 · 2018-05-10 · cs.IT · cs.DM · cs.DS · math.CO · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OYSU7AMPPAOJMIBQ5G2EKAX2QW}

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	2026-05-18T00:16:13.476522Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76254f818f781c962030e9b44502fa859b68fe4d3829200ea0a5df116713f274

Aliases

arxiv: 1805.04151 · arxiv_version: 1805.04151v1 · doi: 10.48550/arxiv.1805.04151 · pith_short_12: OYSU7AMPPAOJ · pith_short_16: OYSU7AMPPAOJMIBQ · pith_short_8: OYSU7AMP

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/OYSU7AMPPAOJMIBQ5G2EKAX2QW \
  | 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: 76254f818f781c962030e9b44502fa859b68fe4d3829200ea0a5df116713f274

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7554df7fb7968686012b91ef3f321e3b5314cd98a4a17b86d10832eb109491fb",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.DS",
      "math.CO",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2018-05-10T19:53:55Z",
    "title_canon_sha256": "8300878bbd8e98aa6768576ea7d34d777ab6d811161183af659621dd817468da"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.04151",
    "kind": "arxiv",
    "version": 1
  }
}