Pith Number

pith:4NB6OYTI

pith:2014:4NB6OYTIQTUT7BA6VOPFMPOHVN

not attested not anchored not stored refs pending

A PTAS for the continuous 1.5D Terrain Guarding Problem

Christiane Schmidt, Michael Hemmer, Stephan Friedrichs

arxiv:1405.6564 v3 · 2014-05-26 · 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{4NB6OYTIQTUT7BA6VOPFMPOHVN}

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	2026-05-18T02:46:24.213538Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e343e7626884e93f841eab9e563dc7ab6e937b648f1021100d3a3a818d778f72

Aliases

arxiv: 1405.6564 · arxiv_version: 1405.6564v3 · doi: 10.48550/arxiv.1405.6564 · pith_short_12: 4NB6OYTIQTUT · pith_short_16: 4NB6OYTIQTUT7BA6 · pith_short_8: 4NB6OYTI

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/4NB6OYTIQTUT7BA6VOPFMPOHVN \
  | 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: e343e7626884e93f841eab9e563dc7ab6e937b648f1021100d3a3a818d778f72

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5685db56a3cdea35cdd621ea2004ee4a53fd7d298ff90890e5cab1f6602a43bb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2014-05-26T13:13:37Z",
    "title_canon_sha256": "90a428d881bcc3d5224bc42ecbfe0df2d2bf410ea84ff694b94989f9e8cbc001"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.6564",
    "kind": "arxiv",
    "version": 3
  }
}