Pith Number

pith:AAY2NU2R

pith:2015:AAY2NU2R7HDHMIVM5BSESF5POS

not attested not anchored not stored refs pending

Straight-line Drawability of a Planar Graph Plus an Edge

Giuseppe Liotta, Naoki Katoh, Peter Eades, Seok-Hee Hong, Sheung-Hung Poon

arxiv:1504.06540 v2 · 2015-04-24 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AAY2NU2R7HDHMIVM5BSESF5POS}

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	2026-05-18T01:37:34.722967Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0031a6d351f9c67622ace8644917af74a64d927574396ea6070384aaa79e602a

Aliases

arxiv: 1504.06540 · arxiv_version: 1504.06540v2 · doi: 10.48550/arxiv.1504.06540 · pith_short_12: AAY2NU2R7HDH · pith_short_16: AAY2NU2R7HDHMIVM · pith_short_8: AAY2NU2R

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/AAY2NU2R7HDHMIVM5BSESF5POS \
  | 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: 0031a6d351f9c67622ace8644917af74a64d927574396ea6070384aaa79e602a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fb2bb45d69e5bd7c6ff115fe3b2f9c4557d8949b41bfd360e16c0d279d375aab",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2015-04-24T15:26:02Z",
    "title_canon_sha256": "891d63f2266b5e77937f670aedb4bf8cd5797fa2c5a069d8fc65a0a845d1c05f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.06540",
    "kind": "arxiv",
    "version": 2
  }
}