Pith Number

pith:PIMPU6NW

pith:2013:PIMPU6NW3REYAQGUTDUV3GNSQC

not attested not anchored not stored refs pending

A (7/2)-Approximation Algorithm for Guarding Orthogonal Art Galleries with Sliding Cameras

Ali Mehrabi, Omrit Filtser, Robert Fraser, Saeed Mehrabi, Stephane Durocher

arxiv:1308.2757 v3 · 2013-08-13 · 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{PIMPU6NW3REYAQGUTDUV3GNSQC}

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	2026-05-18T03:11:59.037667Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a18fa79b6dc498040d498e95d99b28089ee0f9c4d604675d08f7750e76e0561

Aliases

arxiv: 1308.2757 · arxiv_version: 1308.2757v3 · doi: 10.48550/arxiv.1308.2757 · pith_short_12: PIMPU6NW3REY · pith_short_16: PIMPU6NW3REYAQGU · pith_short_8: PIMPU6NW

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/PIMPU6NW3REYAQGUTDUV3GNSQC \
  | 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: 7a18fa79b6dc498040d498e95d99b28089ee0f9c4d604675d08f7750e76e0561

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "adf885f9cf5316997848ef9109d393cde77f6186215435ef081993da7bed1385",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2013-08-13T05:16:18Z",
    "title_canon_sha256": "c6c86aac9f5d6c74da4403497f912255014f9385c5f865375888b46bd3e71fa8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.2757",
    "kind": "arxiv",
    "version": 3
  }
}