Pith Number

pith:RJ7NF5IF

pith:2015:RJ7NF5IFTWDCJJLPZUZVVFQSTB

not attested not anchored not stored refs pending

Metric $1$-median selection: Query complexity vs. approximation ratio

Ching-Lueh Chang

arxiv:1509.05662 v1 · 2015-09-18 · 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{RJ7NF5IFTWDCJJLPZUZVVFQSTB}

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	2026-05-18T01:32:42.659943Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8a7ed2f5059d8624a56fcd335a9612986b3a2d20e98bf29c689f31c286be6e7d

Aliases

arxiv: 1509.05662 · arxiv_version: 1509.05662v1 · doi: 10.48550/arxiv.1509.05662 · pith_short_12: RJ7NF5IFTWDC · pith_short_16: RJ7NF5IFTWDCJJLP · pith_short_8: RJ7NF5IF

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/RJ7NF5IFTWDCJJLPZUZVVFQSTB \
  | 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: 8a7ed2f5059d8624a56fcd335a9612986b3a2d20e98bf29c689f31c286be6e7d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6ee53101f1e1d7038fcbbab0c531a7cb9472ca84ef4751cbc2c424e235da188",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2015-09-18T15:23:32Z",
    "title_canon_sha256": "916d36c0dcf3bb24f6b2eafb69effd08b8001b9a26225b3072cf7a3515d75a5f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.05662",
    "kind": "arxiv",
    "version": 1
  }
}