Pith Number

pith:NOHMQPRB

pith:2017:NOHMQPRB424QROMSONF4TDQ5KD

not attested not anchored not stored refs pending

Constant-Factor Approximation for Ordered k-Median

Jaros{\l}aw Byrka, Joachim Spoerhase, Krzysztof Sornat

arxiv:1711.01972 v2 · 2017-11-06 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NOHMQPRB424QROMSONF4TDQ5KD}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:22:18.626192Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b8ec83e21e6b908b992734bc98e1d50cfab3119328757f7d6f61b347741c627

Aliases

arxiv: 1711.01972 · arxiv_version: 1711.01972v2 · doi: 10.48550/arxiv.1711.01972 · pith_short_12: NOHMQPRB424Q · pith_short_16: NOHMQPRB424QROMS · pith_short_8: NOHMQPRB

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/NOHMQPRB424QROMSONF4TDQ5KD \
  | 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: 6b8ec83e21e6b908b992734bc98e1d50cfab3119328757f7d6f61b347741c627

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0cd205022009300227120f109687e86c9b32df87af360fc4705c53339d36d3d7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2017-11-06T15:54:16Z",
    "title_canon_sha256": "199b927fae6a15da5ab860a0784cc778796d4c012fb8e4f810166a07bb39b789"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.01972",
    "kind": "arxiv",
    "version": 2
  }
}