Pith Number

pith:U26F7MZS

pith:2011:U26F7MZS3VDQZ36XVQOS6VIPO4

not attested not anchored not stored refs pending

A $(k + 3)/2$-approximation algorithm for monotone submodular maximization over a $k$-exchange system

Justin Ward

arxiv:1108.4983 v2 · 2011-08-25 · 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{U26F7MZS3VDQZ36XVQOS6VIPO4}

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	2026-05-18T04:00:26.634933Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6bc5fb332dd470cefd7ac1d2f550f771b1eca88f8c15c3027aa9aba5618342f

Aliases

arxiv: 1108.4983 · arxiv_version: 1108.4983v2 · doi: 10.48550/arxiv.1108.4983 · pith_short_12: U26F7MZS3VDQ · pith_short_16: U26F7MZS3VDQZ36X · pith_short_8: U26F7MZS

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/U26F7MZS3VDQZ36XVQOS6VIPO4 \
  | 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: a6bc5fb332dd470cefd7ac1d2f550f771b1eca88f8c15c3027aa9aba5618342f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "397fb4d3b32449090cf38ea9e786e4c23d2fd1413be3a9403f1d204200c67b7f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-08-25T01:28:59Z",
    "title_canon_sha256": "437512d714b3d62b00147a4eae4a6343bd33151d586b1f62b403666081c15405"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.4983",
    "kind": "arxiv",
    "version": 2
  }
}