Pith Number

pith:FDBRP6V6

pith:2008:FDBRP6V6TRINERAYUJK2OXMG2N

not attested not anchored not stored refs pending

An Improved Approximation Algorithm for the Column Subset Selection Problem

Christos Boutsidis, Michael W. Mahoney, Petros Drineas

arxiv:0812.4293 v2 · 2008-12-22 · 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{FDBRP6V6TRINERAYUJK2OXMG2N}

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	2026-05-18T02:24:56.636130Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28c317fabe9c50d24418a255a75d86d3682f231b9ca00918ca0620185a2d268c

Aliases

arxiv: 0812.4293 · arxiv_version: 0812.4293v2 · doi: 10.48550/arxiv.0812.4293 · pith_short_12: FDBRP6V6TRIN · pith_short_16: FDBRP6V6TRINERAY · pith_short_8: FDBRP6V6

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/FDBRP6V6TRINERAYUJK2OXMG2N \
  | 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: 28c317fabe9c50d24418a255a75d86d3682f231b9ca00918ca0620185a2d268c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dbd3b352574c537250fb476ce6e1e8a103e9fced9799d9b63d06f41f982cb457",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2008-12-22T21:16:55Z",
    "title_canon_sha256": "4baa873f081ca24bba7dd5ab2ee5ac15c66b29bd9a9b5c1fd76e1d531abab047"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.4293",
    "kind": "arxiv",
    "version": 2
  }
}