Pith Number

pith:3CEK5673

pith:2008:3CEK5673C2BG27MI5CBTKYHOBL

not attested not anchored not stored refs pending

Holomorphic Engel Structures

Francisco Presas, Luis Eduardo Sola Conde

arxiv:0811.1354 v1 · 2008-11-09 · 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{3CEK5673C2BG27MI5CBTKYHOBL}

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	2026-05-18T02:47:13.453854Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d888aefbfb16826d7d88e8833560ee0ae94d8e44d3cd5cee0c058798aed5b833

Aliases

arxiv: 0811.1354 · arxiv_version: 0811.1354v1 · doi: 10.48550/arxiv.0811.1354 · pith_short_12: 3CEK5673C2BG · pith_short_16: 3CEK5673C2BG27MI · pith_short_8: 3CEK5673

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/3CEK5673C2BG27MI5CBTKYHOBL \
  | 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: d888aefbfb16826d7d88e8833560ee0ae94d8e44d3cd5cee0c058798aed5b833

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "064a779de90e7e06c43c3b857a507baae396fd78b20df67b887c31d1226e6493",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2008-11-09T17:37:25Z",
    "title_canon_sha256": "14e04dc86183a90fab4567b950e137fdcebc96d87be731d02227369f8d6a83c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0811.1354",
    "kind": "arxiv",
    "version": 1
  }
}