Pith Number

pith:J2D7FQEX

pith:2011:J2D7FQEXH2BNJ2ZBZTG7UOLPQK

not attested not anchored not stored refs pending

On some results by S. Belkov and I. Korepanov

A. Skopenkov

arxiv:1105.0085 v1 · 2011-04-30 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{J2D7FQEXH2BNJ2ZBZTG7UOLPQK}

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	2026-05-18T04:23:12.534284Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4e87f2c0973e82d4eb21cccdfa396f82a6412eae425b69f4ab1985ed6b04c091

Aliases

arxiv: 1105.0085 · arxiv_version: 1105.0085v1 · doi: 10.48550/arxiv.1105.0085 · pith_short_12: J2D7FQEXH2BN · pith_short_16: J2D7FQEXH2BNJ2ZB · pith_short_8: J2D7FQEX

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/J2D7FQEXH2BNJ2ZBZTG7UOLPQK \
  | 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: 4e87f2c0973e82d4eb21cccdfa396f82a6412eae425b69f4ab1985ed6b04c091

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea7287d3dcc7ab748d0a53e7115906c2c0504aa55aabb0e0a33be495ffdb88da",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2011-04-30T13:13:00Z",
    "title_canon_sha256": "d72accdc8140eef6b9748cb13f237071a8ba486ef4a35aa096051b1081e4412d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.0085",
    "kind": "arxiv",
    "version": 1
  }
}