Pith Number

pith:PG7Q7YRK

pith:2026:PG7Q7YRKS2NBVIVQZ5CY36P6Z3

not attested not anchored not stored refs pending

The Base Change Of Fundamental Group Schemes

Lingguang Li, Niantao Tian

arxiv:2602.11110 v2 · 2026-02-11 · 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{PG7Q7YRKS2NBVIVQZ5CY36P6Z3}

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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.

Cited by

2 papers in Pith

The Lefschetz Type Theorem For Fundamental Group Schemes

The Birational Invariance Of Fundamental Group Schemes

Receipt and verification

First computed	2026-06-10T01:10:59.388587Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79bf0fe22a969a1aa2b0cf458df9fecedec59c58d40aec34ed28017ff4deb44f

Aliases

arxiv: 2602.11110 · arxiv_version: 2602.11110v2 · doi: 10.48550/arxiv.2602.11110 · pith_short_12: PG7Q7YRKS2NB · pith_short_16: PG7Q7YRKS2NBVIVQ · pith_short_8: PG7Q7YRK

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/PG7Q7YRKS2NBVIVQZ5CY36P6Z3 \
  | 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: 79bf0fe22a969a1aa2b0cf458df9fecedec59c58d40aec34ed28017ff4deb44f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1384177e4a07b5b716287019f35053a121dada6354e512de27e51478e6d6411d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2026-02-11T18:23:58Z",
    "title_canon_sha256": "a9b675b08f803df561e4babeede9f6791aa04402065a37edc99177a76bf0180e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.11110",
    "kind": "arxiv",
    "version": 2
  }
}