Pith Number

pith:G5HAEPH4

pith:2013:G5HAEPH4LC7AA77LFLLQADYGN4

not attested not anchored not stored refs pending

A weak form of Hadwiger's conjecture

Dominic van der Zypen

arxiv:1312.2829 v3 · 2013-12-10 · 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{G5HAEPH4LC7AA77LFLLQADYGN4}

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	2026-05-18T03:04:58.902997Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

374e023cfc58be007feb2ad7000f066f28aba578e92ea7184962f72b5d984167

Aliases

arxiv: 1312.2829 · arxiv_version: 1312.2829v3 · doi: 10.48550/arxiv.1312.2829 · pith_short_12: G5HAEPH4LC7A · pith_short_16: G5HAEPH4LC7AA77L · pith_short_8: G5HAEPH4

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/G5HAEPH4LC7AA77LFLLQADYGN4 \
  | 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: 374e023cfc58be007feb2ad7000f066f28aba578e92ea7184962f72b5d984167

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e07503c42c95b568eb6796374a39c86de5644ee401eda7059a879a2cc08403ac",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-12-10T15:15:24Z",
    "title_canon_sha256": "4e4264bf5295647d6a8cfd7dcad057bbe779db49245b1e6d3a5e80656ba9506a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.2829",
    "kind": "arxiv",
    "version": 3
  }
}