Pith Number

pith:PKD6CYEE

pith:2010:PKD6CYEEGHGUNCIM4PZHSMPYJH

not attested not anchored not stored refs pending

An approximation algorithm for the total cover problem

Pooya Hatami

arxiv:1008.3216 v1 · 2010-08-19 · 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{PKD6CYEEGHGUNCIM4PZHSMPYJH}

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	2026-05-18T04:42:03.105602Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a87e1608431cd46890ce3f27931f849e34d37e49626fc218ec839e6644a1041

Aliases

arxiv: 1008.3216 · arxiv_version: 1008.3216v1 · doi: 10.48550/arxiv.1008.3216 · pith_short_12: PKD6CYEEGHGU · pith_short_16: PKD6CYEEGHGUNCIM · pith_short_8: PKD6CYEE

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/PKD6CYEEGHGUNCIM4PZHSMPYJH \
  | 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: 7a87e1608431cd46890ce3f27931f849e34d37e49626fc218ec839e6644a1041

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de8ad54d98bdc51186b9db61d140bd8ecdf746b7aaf524bc7498a65ac17d836c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2010-08-19T04:51:15Z",
    "title_canon_sha256": "a0c874a6dc2399b80bf2ce5ec285a94d6b2a2c18412f7b4e379c4f12930b17d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.3216",
    "kind": "arxiv",
    "version": 1
  }
}