Pith Number

pith:3SCU4DOH

pith:2006:3SCU4DOH53FNPZLWB5HPSD5Q3C

not attested not anchored not stored refs pending

On Nori's Fundamental Group Scheme

H\'el\`ene Esnault, Ph\`ung H\^o Hai, Xiaotao Sun

arxiv:math/0605645 v3 · 2006-05-24 · 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{3SCU4DOH53FNPZLWB5HPSD5Q3C}

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	2026-05-17T23:45:55.701129Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc854e0dc7eecad7e5760f4ef90fb0d88f1b9180cd8444f60715f596ab05884d

Aliases

arxiv: math/0605645 · arxiv_version: math/0605645v3 · doi: 10.48550/arxiv.math/0605645 · pith_short_12: 3SCU4DOH53FN · pith_short_16: 3SCU4DOH53FNPZLW · pith_short_8: 3SCU4DOH

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/3SCU4DOH53FNPZLWB5HPSD5Q3C \
  | 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: dc854e0dc7eecad7e5760f4ef90fb0d88f1b9180cd8444f60715f596ab05884d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f94bdd6b011aebd9ab444e65c952e2df1a083e588cb7924ce6c28eba1a2df7f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AG",
    "submitted_at": "2006-05-24T18:36:26Z",
    "title_canon_sha256": "e53f680f5a042398c18e202260e8eb1ba8d5907a18e6166390462cc7c226a399"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0605645",
    "kind": "arxiv",
    "version": 3
  }
}