Pith Number

pith:QIR7J3XK

pith:2014:QIR7J3XKQXV6UMBM3D3JD5NEM4

not attested not anchored not stored refs pending

Durfee's conjecture on the signature of smoothings of surface singularities

Andr\'as N\'emethi, J\'anos Koll\'ar, Tommaso de Fernex

arxiv:1411.1039 v1 · 2014-11-04 · math.AG · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QIR7J3XKQXV6UMBM3D3JD5NEM4}

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	2026-05-18T02:38:37.670662Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8223f4eeea85ebea302cd8f691f5a467045e84e4f3a88be21b5c34157f95c22f

Aliases

arxiv: 1411.1039 · arxiv_version: 1411.1039v1 · doi: 10.48550/arxiv.1411.1039 · pith_short_12: QIR7J3XKQXV6 · pith_short_16: QIR7J3XKQXV6UMBM · pith_short_8: QIR7J3XK

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/QIR7J3XKQXV6UMBM3D3JD5NEM4 \
  | 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: 8223f4eeea85ebea302cd8f691f5a467045e84e4f3a88be21b5c34157f95c22f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3449ccfe5f97ecd1e1b04c3073f7b952890cf1cc11c1451f5dc2c0d1f16f7814",
    "cross_cats_sorted": [
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-11-04T20:45:07Z",
    "title_canon_sha256": "06e5b64f007c48cdac9cdbf275df169df33660a0c080245c308cfd7add51e133"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.1039",
    "kind": "arxiv",
    "version": 1
  }
}