Pith Number

pith:YLR5INM2

pith:2009:YLR5INM2GZTUNGNAGQHD3KFK6Q

not attested not anchored not stored refs pending

On a conjecture of Vorst

Lars Hesselholt, Thomas Geisser

arxiv:0911.2752 v1 · 2009-11-14 · math.KT · 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{YLR5INM2GZTUNGNAGQHD3KFK6Q}

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	2026-05-18T03:30:03.329139Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c2e3d4359a36674699a0340e3da8aaf42f80fca47e3b723bd3cfe641b88ab612

Aliases

arxiv: 0911.2752 · arxiv_version: 0911.2752v1 · doi: 10.48550/arxiv.0911.2752 · pith_short_12: YLR5INM2GZTU · pith_short_16: YLR5INM2GZTUNGNA · pith_short_8: YLR5INM2

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/YLR5INM2GZTUNGNAGQHD3KFK6Q \
  | 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: c2e3d4359a36674699a0340e3da8aaf42f80fca47e3b723bd3cfe641b88ab612

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a974ed7766db00d52ce9cc2254775d776c8b0cb229a0780fd675d348a3ea7ae2",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2009-11-14T08:39:42Z",
    "title_canon_sha256": "059f5dab097f990573a889b1ab068da20d19c17b2a240e4cd229ad7612cc4771"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.2752",
    "kind": "arxiv",
    "version": 1
  }
}