Pith Number

pith:E6DKBM2O

pith:2018:E6DKBM2OTGLBKMRTFOS3GD5DZC

not attested not anchored not stored refs pending

Hardness and algorithmic results for the approximate cover problem

Alexandru Popa, Andrei Tanasescu

arxiv:1806.08135 v1 · 2018-06-21 · 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{E6DKBM2OTGLBKMRTFOS3GD5DZC}

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	2026-05-18T00:12:41.944255Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2786a0b34e99961532332ba5b30fa3c892162e3db8b9cf29a727c6d4a6eff16b

Aliases

arxiv: 1806.08135 · arxiv_version: 1806.08135v1 · doi: 10.48550/arxiv.1806.08135 · pith_short_12: E6DKBM2OTGLB · pith_short_16: E6DKBM2OTGLBKMRT · pith_short_8: E6DKBM2O

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/E6DKBM2OTGLBKMRTFOS3GD5DZC \
  | 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: 2786a0b34e99961532332ba5b30fa3c892162e3db8b9cf29a727c6d4a6eff16b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9cc424157559fa00684fd60a9d7f109918b2110bbacdee3c54f54fba68496c09",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-06-21T09:34:25Z",
    "title_canon_sha256": "1171cad5c7a3dee664467adc0e4290f1852007e280a8d77ac292ae382ee186db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.08135",
    "kind": "arxiv",
    "version": 1
  }
}