Pith Number

pith:MXUOK4QX

pith:2019:MXUOK4QXJL2RHRTCKWSJDQQ57S

not attested not anchored not stored refs pending

Non-separating Planar Graphs

Graham Farr, Hooman R. Dehkordi

arxiv:1907.09817 v1 · 2019-07-23 · 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{MXUOK4QXJL2RHRTCKWSJDQQ57S}

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	2026-05-17T23:39:49.966009Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

65e8e572174af513c66255a491c21dfc905fb6dc36b2d40f0d49fda6a2b125bf

Aliases

arxiv: 1907.09817 · arxiv_version: 1907.09817v1 · doi: 10.48550/arxiv.1907.09817 · pith_short_12: MXUOK4QXJL2R · pith_short_16: MXUOK4QXJL2RHRTC · pith_short_8: MXUOK4QX

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/MXUOK4QXJL2RHRTCKWSJDQQ57S \
  | 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: 65e8e572174af513c66255a491c21dfc905fb6dc36b2d40f0d49fda6a2b125bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc002c611f93dc9424f6bdd78861c900f19de08b93fa83d9394a3a025ebb45f7",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-07-23T11:15:45Z",
    "title_canon_sha256": "3ab5c3e25ad322b327187607ddb7ef11ead295bcba57d648f95023c188424ab4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.09817",
    "kind": "arxiv",
    "version": 1
  }
}