Pith Number

pith:OEUGSQKA

pith:2018:OEUGSQKAY6SX2X2NSJ4XG64Z6U

not attested not anchored not stored refs pending

Chain, Generalization of Covering Code, and Deterministic Algorithm for k-SAT

S. Cliff Liu

arxiv:1804.07901 v7 · 2018-04-21 · 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{OEUGSQKAY6SX2X2NSJ4XG64Z6U}

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	2026-07-05T00:48:58.060278Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7128694140c7a57d5f4d9279737b99f5384e5e8d7e823d18939ee61efff6979e

Aliases

arxiv: 1804.07901 · arxiv_version: 1804.07901v7 · doi: 10.48550/arxiv.1804.07901 · pith_short_12: OEUGSQKAY6SX · pith_short_16: OEUGSQKAY6SX2X2N · pith_short_8: OEUGSQKA

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/OEUGSQKAY6SX2X2NSJ4XG64Z6U \
  | 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: 7128694140c7a57d5f4d9279737b99f5384e5e8d7e823d18939ee61efff6979e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d8549cccdaba3a4c20100e46bb7ca493194602468bee216067b5d18f052ba0ae",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-04-21T06:31:00Z",
    "title_canon_sha256": "fcfdb9efbdb334fb316d837e0bb256da208630eb21abed6dd528d5771629e232"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.07901",
    "kind": "arxiv",
    "version": 7
  }
}