Pith Number

pith:V7LFRPGH

pith:2010:V7LFRPGHBQQYH5EWLV6BDMDWGK

not attested not anchored not stored refs pending

Patrolling a Street Network is Strongly NP-Complete but in P for Tree Structures

Valentin E. Brimkov

arxiv:1004.0744 v1 · 2010-04-06 · cs.CG · cs.CC · cs.DM · cs.DS · 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{V7LFRPGHBQQYH5EWLV6BDMDWGK}

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	2026-05-18T02:24:17.500779Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

afd658bcc70c2183f4965d7c11b07632a3020f5324cc53211b288e4e661acdad

Aliases

arxiv: 1004.0744 · arxiv_version: 1004.0744v1 · doi: 10.48550/arxiv.1004.0744 · pith_short_12: V7LFRPGHBQQY · pith_short_16: V7LFRPGHBQQYH5EW · pith_short_8: V7LFRPGH

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/V7LFRPGHBQQYH5EWLV6BDMDWGK \
  | 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: afd658bcc70c2183f4965d7c11b07632a3020f5324cc53211b288e4e661acdad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31080cb29a9a1cf7a1c32f413eefacef32a871313feece23b3245229f982c3d9",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DM",
      "cs.DS",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2010-04-06T01:06:27Z",
    "title_canon_sha256": "b02ea44093fd8cd86a9c55d990a25fe6460dc7714057e5a6c764355fb3f938e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.0744",
    "kind": "arxiv",
    "version": 1
  }
}