Pith Number

pith:3AG3KVBK

pith:2026:3AG3KVBKADYSZSVR5WUXD23MMZ

not attested not anchored not stored refs pending

\'Etale Fundamental Groups -- a geometric and topological approach to fundamental groups in algebraic geometry

Loris De Vos

arxiv:2606.23906 v1 · 2026-06-22 · math.AG · math.AT · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3AG3KVBKADYSZSVR5WUXD23MMZ}

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	2026-06-24T00:14:29.846711Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d80db5542a00f12ccab1eda971eb6c667b6a6c5e0fb4b418f548cbd2340da6c9

Aliases

arxiv: 2606.23906 · arxiv_version: 2606.23906v1 · doi: 10.48550/arxiv.2606.23906 · pith_short_12: 3AG3KVBKADYS · pith_short_16: 3AG3KVBKADYSZSVR · pith_short_8: 3AG3KVBK

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/3AG3KVBKADYSZSVR5WUXD23MMZ \
  | 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: d80db5542a00f12ccab1eda971eb6c667b6a6c5e0fb4b418f548cbd2340da6c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a609d667e0f62b92686806f4f1d7e858c00d2e2a75db4ec28487cf2fbcea9f4a",
    "cross_cats_sorted": [
      "math.AT",
      "math.CT"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2026-06-22T20:09:28Z",
    "title_canon_sha256": "2f839cd7f19cf4482822c1894bdd53c9ad242d3f89871b2c3926f7b67fc74bbd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.23906",
    "kind": "arxiv",
    "version": 1
  }
}