Pith Number

pith:XH4KEZN7

pith:2013:XH4KEZN7ZKWASLPMNFR4WIMDA5

not attested not anchored not stored refs pending

On the fundamental group of a variety with quotient singularities

Amit Hogadi, Indranil Biswas

arxiv:1311.6086 v1 · 2013-11-24 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XH4KEZN7ZKWASLPMNFR4WIMDA5}

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	2026-05-18T03:06:20.599563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9f8a265bfcaac092dec6963cb2183076fe4f117332194d8b2cc36f0a3fac531

Aliases

arxiv: 1311.6086 · arxiv_version: 1311.6086v1 · doi: 10.48550/arxiv.1311.6086 · pith_short_12: XH4KEZN7ZKWA · pith_short_16: XH4KEZN7ZKWASLPM · pith_short_8: XH4KEZN7

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/XH4KEZN7ZKWASLPMNFR4WIMDA5 \
  | 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: b9f8a265bfcaac092dec6963cb2183076fe4f117332194d8b2cc36f0a3fac531

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88e585a0f668f96446a28181e2cd220bfb8851da4e869b60808da5e7f1924faf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-11-24T05:58:40Z",
    "title_canon_sha256": "ff41bce09ddb2e5c531440e52901e6c7884152343ecfcb0d05a027ab107a9c55"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.6086",
    "kind": "arxiv",
    "version": 1
  }
}