Pith Number

pith:AXM2TU5F

pith:2010:AXM2TU5FSNDCP3LU4JCQYJ3NLQ

not attested not anchored not stored refs pending

The Straight-Line RAC Drawing Problem is NP-Hard

Antonios Symvonis, Evmorfia N. Argyriou, Michael A. Bekos

arxiv:1009.5227 v1 · 2010-09-27 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AXM2TU5FSNDCP3LU4JCQYJ3NLQ}

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	2026-05-18T02:05:16.881959Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

05d9a9d3a5934627ed74e2450c276d5c347d5ae8a41917f320e9df27f8d319f8

Aliases

arxiv: 1009.5227 · arxiv_version: 1009.5227v1 · doi: 10.48550/arxiv.1009.5227 · pith_short_12: AXM2TU5FSNDC · pith_short_16: AXM2TU5FSNDCP3LU · pith_short_8: AXM2TU5F

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/AXM2TU5FSNDCP3LU4JCQYJ3NLQ \
  | 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: 05d9a9d3a5934627ed74e2450c276d5c347d5ae8a41917f320e9df27f8d319f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d6ef2308a49552e097c83d323392dac5538c453bac4ee60d767ce954ef15b82",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2010-09-27T11:33:39Z",
    "title_canon_sha256": "c79cf7d7210c3a234959a5f7423d56bb136132d1630b0ba31868571f9942d38c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.5227",
    "kind": "arxiv",
    "version": 1
  }
}