Pith Number

pith:QWZS7RYE

pith:2012:QWZS7RYE7VVZPUS7KLIXLEAJGM

not attested not anchored not stored refs pending

On the Parameterized and Approximation Hardness of Metric Dimension

Andr\'e Nichterlein, Sepp Hartung

arxiv:1211.1636 v1 · 2012-11-07 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QWZS7RYE7VVZPUS7KLIXLEAJGM}

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	2026-05-18T03:41:20.603123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85b32fc704fd6b97d25f52d175900933009a4d8d83952a87c7207baadafbc10e

Aliases

arxiv: 1211.1636 · arxiv_version: 1211.1636v1 · doi: 10.48550/arxiv.1211.1636 · pith_short_12: QWZS7RYE7VVZ · pith_short_16: QWZS7RYE7VVZPUS7 · pith_short_8: QWZS7RYE

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/QWZS7RYE7VVZPUS7KLIXLEAJGM \
  | 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: 85b32fc704fd6b97d25f52d175900933009a4d8d83952a87c7207baadafbc10e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae5338a8364c3bd358a91ca1e7572bb1a9d780505c07bcd793011426a6d02279",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2012-11-07T18:50:44Z",
    "title_canon_sha256": "fd08c4be22ddc758d9250e9a5332c47bdecaf0d6b3469953c92cec1e4c45aa9f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.1636",
    "kind": "arxiv",
    "version": 1
  }
}