Pith Number

pith:D6VUY57E

pith:2002:D6VUY57E4YVZHPB3UIGTTEATXV

not attested not anchored not stored refs pending

Engel structures with trivial characteristic foliations

Jiro Adachi

arxiv:math/0205100 v1 · 2002-05-09 · math.SG · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D6VUY57E4YVZHPB3UIGTTEATXV}

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	2026-05-18T02:41:33.049670Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fab4c77e4e62b93bc3ba20d399013bd58ef24c000b00d18e2338ee0b80b54eb

Aliases

arxiv: math/0205100 · arxiv_version: math/0205100v1 · doi: 10.48550/arxiv.math/0205100 · pith_short_12: D6VUY57E4YVZ · pith_short_16: D6VUY57E4YVZHPB3 · pith_short_8: D6VUY57E

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/D6VUY57E4YVZHPB3UIGTTEATXV \
  | 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: 1fab4c77e4e62b93bc3ba20d399013bd58ef24c000b00d18e2338ee0b80b54eb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c424b8f2f0f361a4c6445e509e774da925835b19aec15ddfd6de96433f24a5df",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "",
    "primary_cat": "math.SG",
    "submitted_at": "2002-05-09T20:43:18Z",
    "title_canon_sha256": "cb4ce48ee1b75a00bcb05298b44a9f388ab258268d4518dce4726703b3a39c30"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0205100",
    "kind": "arxiv",
    "version": 1
  }
}