Pith Number

pith:2CZWVT4P

pith:2002:2CZWVT4PRRXMTA2MHGW4GBAVLH

not attested not anchored not stored refs pending

Gerbes and homotopy quantum field theories

Paul Turner, Simon Willerton, Ulrich Bunke

arxiv:math/0201116 v3 · 2002-01-14 · math.AT · math.QA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2CZWVT4PRRXMTA2MHGW4GBAVLH}

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	2026-05-18T02:41:33.157128Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0b36acf8f8c6ec9834c39adc3041559c04d231b20e8f3f9de4ddc71e50a4edf

Aliases

arxiv: math/0201116 · arxiv_version: math/0201116v3 · doi: 10.48550/arxiv.math/0201116 · pith_short_12: 2CZWVT4PRRXM · pith_short_16: 2CZWVT4PRRXMTA2M · pith_short_8: 2CZWVT4P

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/2CZWVT4PRRXMTA2MHGW4GBAVLH \
  | 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: d0b36acf8f8c6ec9834c39adc3041559c04d231b20e8f3f9de4ddc71e50a4edf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5bacd2744f15abd227cd19d2387ea4df33b9eb8da355626d259c5c0fdecddb1",
    "cross_cats_sorted": [
      "math.QA"
    ],
    "license": "",
    "primary_cat": "math.AT",
    "submitted_at": "2002-01-14T17:43:04Z",
    "title_canon_sha256": "b1c9595948dd08adf83fcae490b1e129895bab9952bc133d888ee89be3f287a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0201116",
    "kind": "arxiv",
    "version": 3
  }
}