Pith Number

pith:2HFV6DQ5

pith:2011:2HFV6DQ5HT5GZWRA4T7MRHHRD6

not attested not anchored not stored refs pending

A counterexample to Durfee conjecture

Andr\'as N\'emethi, Dmitry Kerner

arxiv:1109.4869 v4 · 2011-09-22 · math.AG · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2HFV6DQ5HT5GZWRA4T7MRHHRD6}

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	2026-05-18T04:09:26.797043Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1cb5f0e1d3cfa6cda20e4fec89cf11f8dc1327c649dbfe70303480d9683cd11

Aliases

arxiv: 1109.4869 · arxiv_version: 1109.4869v4 · doi: 10.48550/arxiv.1109.4869 · pith_short_12: 2HFV6DQ5HT5G · pith_short_16: 2HFV6DQ5HT5GZWRA · pith_short_8: 2HFV6DQ5

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/2HFV6DQ5HT5GZWRA4T7MRHHRD6 \
  | 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: d1cb5f0e1d3cfa6cda20e4fec89cf11f8dc1327c649dbfe70303480d9683cd11

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fe1240ef7f627b304b6fc26895664e9e3481f08363f9d1b3ca8dd0adaa80bd96",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2011-09-22T16:17:51Z",
    "title_canon_sha256": "71186c90ef8ccaf4e18ebfbdd7e6bce5f87739814eac4d926f802e46499d94fb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4869",
    "kind": "arxiv",
    "version": 4
  }
}