Pith Number

pith:HUNX2JMH

pith:2002:HUNX2JMH2R2XYZMSOXGCHMV3KD

not attested not anchored not stored refs pending

Algebraic surfaces with quotient singularities - including some discussion on automorphisms and fundamental groups

D. -Q. Zhang, J. Keum

arxiv:math/0210005 v1 · 2002-10-01 · 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{HUNX2JMH2R2XYZMSOXGCHMV3KD}

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	2026-05-18T00:12:57.552960Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d1b7d2587d4757c659275cc23b2bb50cf0c73487680b2b009183d64eaa60eca

Aliases

arxiv: math/0210005 · arxiv_version: math/0210005v1 · doi: 10.48550/arxiv.math/0210005 · pith_short_12: HUNX2JMH2R2X · pith_short_16: HUNX2JMH2R2XYZMS · pith_short_8: HUNX2JMH

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/HUNX2JMH2R2XYZMSOXGCHMV3KD \
  | 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: 3d1b7d2587d4757c659275cc23b2bb50cf0c73487680b2b009183d64eaa60eca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a8cb740a5f8520e0983a0ff7672bfffa869bc16d17f3c607ff20c446d5fedd0",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AG",
    "submitted_at": "2002-10-01T08:40:31Z",
    "title_canon_sha256": "ba630b091cf033abfb5a134e5a84f978783d9899fb8ce749b12c77e2fc3c0c52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0210005",
    "kind": "arxiv",
    "version": 1
  }
}