Pith Number

pith:E6AD4QXM

pith:2013:E6AD4QXM3SAHSEF3JFZDECLC6I

not attested not anchored not stored refs pending

Improved approximation algorithm for Fault-Tolerant Facility Placement

Bartosz Rybicki, Jaroslaw Byrka

arxiv:1311.6615 v2 · 2013-11-26 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E6AD4QXM3SAHSEF3JFZDECLC6I}

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	2026-05-18T02:59:20.460124Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

27803e42ecdc807910bb4972320962f206e8e909f8d516f3ddbb5cabcad77d56

Aliases

arxiv: 1311.6615 · arxiv_version: 1311.6615v2 · doi: 10.48550/arxiv.1311.6615 · pith_short_12: E6AD4QXM3SAH · pith_short_16: E6AD4QXM3SAHSEF3 · pith_short_8: E6AD4QXM

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/E6AD4QXM3SAHSEF3JFZDECLC6I \
  | 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: 27803e42ecdc807910bb4972320962f206e8e909f8d516f3ddbb5cabcad77d56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "269d0603cad7251136c8b4bda5d9a34c47ca8902a80f3921357aed3bf54fe0dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2013-11-26T10:49:36Z",
    "title_canon_sha256": "d8fbf158228e8c3122797f72b82b20b2dbb2f3ea27ac6224fbf48f18a94b9573"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.6615",
    "kind": "arxiv",
    "version": 2
  }
}