Pith Number

pith:2PCFDM4B

pith:2017:2PCFDM4BX7NFK5M26YVIXGBKBM

not attested not anchored not stored refs pending

Specialness and Isotriviality for Regular Algebraic Foliations

Ekaterina Amerik, Fr\'ed\'eric Campana

arxiv:1709.07420 v1 · 2017-09-21 · 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{2PCFDM4BX7NFK5M26YVIXGBKBM}

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	2026-05-18T00:34:35.847183Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3c451b381bfda55759af62a8b982a0b1a6436b47f620fedf6ce3db3f56516c0

Aliases

arxiv: 1709.07420 · arxiv_version: 1709.07420v1 · doi: 10.48550/arxiv.1709.07420 · pith_short_12: 2PCFDM4BX7NF · pith_short_16: 2PCFDM4BX7NFK5M2 · pith_short_8: 2PCFDM4B

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/2PCFDM4BX7NFK5M26YVIXGBKBM \
  | 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: d3c451b381bfda55759af62a8b982a0b1a6436b47f620fedf6ce3db3f56516c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db8b97c6600a1a45276136ecfc351a13810a7f8bd35c70f963c98884d42316cb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-09-21T17:09:04Z",
    "title_canon_sha256": "0830aefa95a6bd7b4f32cbdd0b08cf7526488cf832bf1031feb5973419d4023f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.07420",
    "kind": "arxiv",
    "version": 1
  }
}