Pith Number

pith:7AUNNLH3

pith:2011:7AUNNLH3SZIJSOIY6MFADD2LPC

not attested not anchored not stored refs pending

Restricted Parameter Range Promise Set Cover Problems Are Easy

Hao Chen

arxiv:1110.1896 v1 · 2011-10-10 · 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{7AUNNLH3SZIJSOIY6MFADD2LPC}

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	2026-05-18T04:11:19.387187Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f828d6acfb9650993918f30a018f4b7894b74c43f962b98abe0f3d65aea2a61b

Aliases

arxiv: 1110.1896 · arxiv_version: 1110.1896v1 · doi: 10.48550/arxiv.1110.1896 · pith_short_12: 7AUNNLH3SZIJ · pith_short_16: 7AUNNLH3SZIJSOIY · pith_short_8: 7AUNNLH3

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/7AUNNLH3SZIJSOIY6MFADD2LPC \
  | 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: f828d6acfb9650993918f30a018f4b7894b74c43f962b98abe0f3d65aea2a61b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "529826d0a0cf6f08a58edc12b38f59953af5ca9648180096aecad59cbbd99d69",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2011-10-10T00:40:28Z",
    "title_canon_sha256": "6d3b42e0b96ae127e44efa05423b07dd76e459b46d13dbb9c5813dcf191e19fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.1896",
    "kind": "arxiv",
    "version": 1
  }
}