Pith Number

pith:PXXMSMQP

pith:2016:PXXMSMQP524FOKRYX77FFQH2BC

not attested not anchored not stored refs pending

Tighter inapproximability for set cover

David G. Harris

arxiv:1612.01610 v3 · 2016-12-06 · 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{PXXMSMQP524FOKRYX77FFQH2BC}

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	2026-05-18T00:50:37.451548Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7deec9320feeb8572a38bffe52c0fa08b15d5b55a6b75207bccb7fd84e37bb7e

Aliases

arxiv: 1612.01610 · arxiv_version: 1612.01610v3 · doi: 10.48550/arxiv.1612.01610 · pith_short_12: PXXMSMQP524F · pith_short_16: PXXMSMQP524FOKRY · pith_short_8: PXXMSMQP

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/PXXMSMQP524FOKRYX77FFQH2BC \
  | 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: 7deec9320feeb8572a38bffe52c0fa08b15d5b55a6b75207bccb7fd84e37bb7e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b06037368fd8a60610cf211ab0af27d7357822e543472d07d4d9b42f170b430",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2016-12-06T00:53:00Z",
    "title_canon_sha256": "cf69f3e945973a6fa335a92682e10b95947f39dfd599a4e0f6e060820d15ec0a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.01610",
    "kind": "arxiv",
    "version": 3
  }
}