Pith Number

pith:F7IXVZVM

pith:2015:F7IXVZVMUVVDH3CYUV44C2BVB3

not attested not anchored not stored refs pending

A non-Sasakian Lefschetz K-contact manifold of Tievsky type

Antonio De Nicola, Beniamino Cappelletti-Montano, Ivan Yudin, Juan Carlos Marrero

arxiv:1507.04661 v2 · 2015-07-16 · math.DG · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F7IXVZVMUVVDH3CYUV44C2BVB3}

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	2026-05-18T01:03:06.462487Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2fd17ae6aca56a33ec58a579c168350ef42082636c2bd115ab94923e4baf1e02

Aliases

arxiv: 1507.04661 · arxiv_version: 1507.04661v2 · doi: 10.48550/arxiv.1507.04661 · pith_short_12: F7IXVZVMUVVD · pith_short_16: F7IXVZVMUVVDH3CY · pith_short_8: F7IXVZVM

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/F7IXVZVMUVVDH3CYUV44C2BVB3 \
  | 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: 2fd17ae6aca56a33ec58a579c168350ef42082636c2bd115ab94923e4baf1e02

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a828f951a1960f2edbc90d187acd06cdd2e42823a29e45c712879fa45f85bdec",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2015-07-16T17:29:43Z",
    "title_canon_sha256": "8a1205688ff2cff048becba3d0b84362d26f5031f9064afe7569b96aaa380304"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.04661",
    "kind": "arxiv",
    "version": 2
  }
}