Pith Number

pith:UR2R4XRN

pith:2017:UR2R4XRN562NRI4GUV6YHEZ3JZ

not attested not anchored not stored refs pending

Parameterized complexity of machine scheduling: 15 open problems

Matthias Mnich, Ren\'e van Bevern

arxiv:1709.01670 v3 · 2017-09-06 · math.OC · 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{UR2R4XRN562NRI4GUV6YHEZ3JZ}

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	2026-05-18T00:04:32.430182Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4751e5e2defb4d8a386a57d83933b4e4c85db63e5c63d80c538ca35cdf4a944

Aliases

arxiv: 1709.01670 · arxiv_version: 1709.01670v3 · doi: 10.48550/arxiv.1709.01670 · pith_short_12: UR2R4XRN562N · pith_short_16: UR2R4XRN562NRI4G · pith_short_8: UR2R4XRN

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/UR2R4XRN562NRI4GUV6YHEZ3JZ \
  | 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: a4751e5e2defb4d8a386a57d83933b4e4c85db63e5c63d80c538ca35cdf4a944

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f37838d0dc6bda6e65f675d3e31bde4803a44ff66212e808ca380fbe2bcba7b",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-09-06T04:40:02Z",
    "title_canon_sha256": "1ba79b76a69a33583f4eb0eb19fb355b89a41b783591de680352a203d360ae9b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.01670",
    "kind": "arxiv",
    "version": 3
  }
}