Pith Number

pith:YOYMNEXK

pith:2013:YOYMNEXKFF27DIXY5QJ2VWSMLQ

not attested not anchored not stored refs pending

Examples of compact K-contact manifolds with no Sasakian metric

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

arxiv:1311.3270 v2 · 2013-11-13 · math.DG · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YOYMNEXKFF27DIXY5QJ2VWSMLQ}

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	2026-05-18T02:39:32.118036Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3b0c692ea2975f1a2f8ec13aada4c5c33d1ecfd6ec9712d5708f0d3bde43997

Aliases

arxiv: 1311.3270 · arxiv_version: 1311.3270v2 · doi: 10.48550/arxiv.1311.3270 · pith_short_12: YOYMNEXKFF27 · pith_short_16: YOYMNEXKFF27DIXY · pith_short_8: YOYMNEXK

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/YOYMNEXKFF27DIXY5QJ2VWSMLQ \
  | 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: c3b0c692ea2975f1a2f8ec13aada4c5c33d1ecfd6ec9712d5708f0d3bde43997

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "702882072bfefaea1a8fa8b50ca87962c2a10f21ccbe70c21d59d3c0a4656b1b",
    "cross_cats_sorted": [
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2013-11-13T19:46:54Z",
    "title_canon_sha256": "f1c6a7ca05ea2fcb18deb613b495b9788f6ccc89c6571c942b29381e0c0a15e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.3270",
    "kind": "arxiv",
    "version": 2
  }
}