Pith Number

pith:DOY2VO66

pith:2015:DOY2VO66OSVYYMR6RUSKHOUMUQ

not attested not anchored not stored refs pending

The Continuous 1.5D Terrain Guarding Problem: Discretization, Optimal Solutions, and PTAS

Christiane Schmidt, James King, Michael Hemmer, Stephan Friedrichs

arxiv:1509.08285 v3 · 2015-09-28 · 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{DOY2VO66OSVYYMR6RUSKHOUMUQ}

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	2026-05-18T01:11:55.002936Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1bb1aabbde74ab8c323e8d24a3ba8ca409b9f97946e7ef02cba72c45e6c6412d

Aliases

arxiv: 1509.08285 · arxiv_version: 1509.08285v3 · doi: 10.48550/arxiv.1509.08285 · pith_short_12: DOY2VO66OSVY · pith_short_16: DOY2VO66OSVYYMR6 · pith_short_8: DOY2VO66

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/DOY2VO66OSVYYMR6RUSKHOUMUQ \
  | 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: 1bb1aabbde74ab8c323e8d24a3ba8ca409b9f97946e7ef02cba72c45e6c6412d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7fc55525cbf53f691ee33573ade09b1bd85d88d6e7961aafddd627811956fa65",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2015-09-28T11:59:48Z",
    "title_canon_sha256": "52f3c8235884f659e87fcc92912e13a8675db5b0b1fad1bdddd0156a34cd1c56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.08285",
    "kind": "arxiv",
    "version": 3
  }
}