Pith Number

pith:OV2FFED7

pith:2018:OV2FFED762P2I7I3C5UAOLIQUI

not attested not anchored not stored refs pending

The set of vertices with positive curvature in a planar graph with nonnegative curvature

Bobo Hua, Yanhui Su

arxiv:1801.02968 v2 · 2018-01-09 · math.DG · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OV2FFED762P2I7I3C5UAOLIQUI}

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	2026-05-18T00:00:08.876159Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

757452907ff69fa47d1b1768072d10a2079cc9fcf516807014302b6c22d26167

Aliases

arxiv: 1801.02968 · arxiv_version: 1801.02968v2 · doi: 10.48550/arxiv.1801.02968 · pith_short_12: OV2FFED762P2 · pith_short_16: OV2FFED762P2I7I3 · pith_short_8: OV2FFED7

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/OV2FFED762P2I7I3C5UAOLIQUI \
  | 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: 757452907ff69fa47d1b1768072d10a2079cc9fcf516807014302b6c22d26167

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5f32c37fffded8bd794088b348b1161c9f2bd4765b842120687f579a9f528d97",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2018-01-09T14:55:14Z",
    "title_canon_sha256": "fb5c3d7084e3de3d2a9469eca417fbfd039591202348386066adfac4248df115"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.02968",
    "kind": "arxiv",
    "version": 2
  }
}