Pith Number

pith:WQJI5LV5

pith:2019:WQJI5LV52BWS5UMGOXRU55PEFE

not attested not anchored not stored refs pending

Inapproximability Results for Scheduling with Interval and Resource Restrictions

Klaus Jansen, Marten Maack

arxiv:1907.03526 v1 · 2019-07-08 · cs.CC · 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{WQJI5LV52BWS5UMGOXRU55PEFE}

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	2026-05-17T23:41:14.391031Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4128eaebdd06d2ed18675e34ef5e4293233c9836a655424d12183b2322ef90e

Aliases

arxiv: 1907.03526 · arxiv_version: 1907.03526v1 · doi: 10.48550/arxiv.1907.03526 · pith_short_12: WQJI5LV52BWS · pith_short_16: WQJI5LV52BWS5UMG · pith_short_8: WQJI5LV5

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/WQJI5LV52BWS5UMGOXRU55PEFE \
  | 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: b4128eaebdd06d2ed18675e34ef5e4293233c9836a655424d12183b2322ef90e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d34c3d33915fa5b9af7ae6617c9e874e4d6d6abe75f4afc45a88245f67015ad1",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2019-07-08T11:47:49Z",
    "title_canon_sha256": "2032af2f033f7e522a29f011db77d165bf5b19f9326c626244c04b89ed594563"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.03526",
    "kind": "arxiv",
    "version": 1
  }
}