Pith Number

pith:UZPDALD7

pith:1994:UZPDALD7RTVI6ASHOTPCXE72BM

not attested not anchored not stored refs pending

Geometry based heuristics for unit disk graphs

Daniel J. Rosenkrantz, Harry B. Hunt III, H. Breu, Madhav V. Marathe, S. S. Ravi

arxiv:math/9409226 v1 · 1994-09-21 · math.CO · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UZPDALD7RTVI6ASHOTPCXE72BM}

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	2026-05-18T01:05:51.055145Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a65e302c7f8cea8f024774de2b93fa0b3f3f3ec34cbbaaf075696607d40ad2ba

Aliases

arxiv: math/9409226 · arxiv_version: math/9409226v1 · doi: 10.48550/arxiv.math/9409226 · pith_short_12: UZPDALD7RTVI · pith_short_16: UZPDALD7RTVI6ASH · pith_short_8: UZPDALD7

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/UZPDALD7RTVI6ASHOTPCXE72BM \
  | 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: a65e302c7f8cea8f024774de2b93fa0b3f3f3ec34cbbaaf075696607d40ad2ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82936d76d2768ab0fb6174ed169b605e3a2b974d079f4e9dd85161a824c45636",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "",
    "primary_cat": "math.CO",
    "submitted_at": "1994-09-21T00:00:00Z",
    "title_canon_sha256": "fdffe588bd46bf10e043498c2b8e17e8b11d6a822d0f9be341cd36e794951c36"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9409226",
    "kind": "arxiv",
    "version": 1
  }
}