Pith Number

pith:VPRFDSQF

pith:2014:VPRFDSQFJYZDY7KPKM64VH2LBX

not attested not anchored not stored refs pending

A coding problem for pairs of subsets

Bela Bollobas, G. O. H. Katona, Ida Kantor, Imre Leader, Zoltan Furedi

arxiv:1403.3847 v2 · 2014-03-15 · 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{VPRFDSQFJYZDY7KPKM64VH2LBX}

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	2026-05-18T02:25:56.249565Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abe251ca054e323c7d4f533dca9f4b0df49873f31baf9334a964a2c0de933248

Aliases

arxiv: 1403.3847 · arxiv_version: 1403.3847v2 · doi: 10.48550/arxiv.1403.3847 · pith_short_12: VPRFDSQFJYZD · pith_short_16: VPRFDSQFJYZDY7KP · pith_short_8: VPRFDSQF

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/VPRFDSQFJYZDY7KPKM64VH2LBX \
  | 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: abe251ca054e323c7d4f533dca9f4b0df49873f31baf9334a964a2c0de933248

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "011ea478ed2b924d93bd11a1d7a6999e29837168e0c424643b8c901058f7bc3c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-03-15T20:03:44Z",
    "title_canon_sha256": "c197926a26feb0152e0fbb1aa1f6c78ab618ce1ebbaec445fe7eba6d1435a4eb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.3847",
    "kind": "arxiv",
    "version": 2
  }
}