Pith Number

pith:FG6Z4YWS

pith:2025:FG6Z4YWSTLIJ6CYUW4TNFVLX2Q

not attested not anchored not stored refs pending

Segment Intersection Representations, Level Planarity and Constrained Ordering Problems

Matthias Pfretzschner, Peter Stumpf, Simon D. Fink

arxiv:2502.16621 v1 · 2025-02-23 · 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{FG6Z4YWSTLIJ6CYUW4TNFVLX2Q}

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	2026-07-05T10:18:56.534568Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29bd9e62d29ad09f0b14b726d2d577d4069ee33d97ee9ff5b4cc804f6a04a465

Aliases

arxiv: 2502.16621 · arxiv_version: 2502.16621v1 · doi: 10.48550/arxiv.2502.16621 · pith_short_12: FG6Z4YWSTLIJ · pith_short_16: FG6Z4YWSTLIJ6CYU · pith_short_8: FG6Z4YWS

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/FG6Z4YWSTLIJ6CYUW4TNFVLX2Q \
  | 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: 29bd9e62d29ad09f0b14b726d2d577d4069ee33d97ee9ff5b4cc804f6a04a465

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d25a71261b0e4e91a1dd6d4be7cea3e03560c0c6d23a93b39d69b5582fc6e7eb",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2025-02-23T15:50:30Z",
    "title_canon_sha256": "8fe17e68781dc69c29237c3099ecc285d4fc78b99cfc0c1fa9d617b0b666903d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.16621",
    "kind": "arxiv",
    "version": 1
  }
}