Pith Number

pith:YBBNEGAC

pith:2018:YBBNEGACFDGN567R7E3YGCUEZX

not attested not anchored not stored refs pending

The geometry of marked contact Engel structures

Gianni Manno, Katja Sagerschnig, Pawel Nurowski

arxiv:1809.06455 v1 · 2018-09-17 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YBBNEGACFDGN567R7E3YGCUEZX}

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	2026-05-18T00:05:27.162967Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c042d2180228ccdefbf1f937830a84cde31425308245c982258db63d436db724

Aliases

arxiv: 1809.06455 · arxiv_version: 1809.06455v1 · doi: 10.48550/arxiv.1809.06455 · pith_short_12: YBBNEGACFDGN · pith_short_16: YBBNEGACFDGN567R · pith_short_8: YBBNEGAC

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/YBBNEGACFDGN567R7E3YGCUEZX \
  | 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: c042d2180228ccdefbf1f937830a84cde31425308245c982258db63d436db724

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "021381b3ba890ac63ad2cc8770a5d07245834cc8bcb154d41095a97c7895f405",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2018-09-17T21:47:30Z",
    "title_canon_sha256": "06e0f1219dfdf8f7375817b6fda1ef852b44790009caac0a59392d3ccf8b8981"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.06455",
    "kind": "arxiv",
    "version": 1
  }
}