Pith Number

pith:JNB6V3X2

pith:2018:JNB6V3X2KVNAZSUIUPPYONUUPQ

not attested not anchored not stored refs pending

Reduction-based exact solution of prize-collecting Steiner tree problems

Daniel Rehfeldt, Thorsten Koch

arxiv:1811.09068 v1 · 2018-11-22 · math.OC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JNB6V3X2KVNAZSUIUPPYONUUPQ}

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	2026-05-18T00:00:07.169234Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4b43eaeefa555a0cca88a3df8736947c3a9a63670739cd67f97f6b3840aef519

Aliases

arxiv: 1811.09068 · arxiv_version: 1811.09068v1 · doi: 10.48550/arxiv.1811.09068 · pith_short_12: JNB6V3X2KVNA · pith_short_16: JNB6V3X2KVNAZSUI · pith_short_8: JNB6V3X2

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/JNB6V3X2KVNAZSUIUPPYONUUPQ \
  | 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: 4b43eaeefa555a0cca88a3df8736947c3a9a63670739cd67f97f6b3840aef519

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8c3764f62bdd703801135d177679daa0e40a0c2daebf563ba85482660068642",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-11-22T09:18:50Z",
    "title_canon_sha256": "e88381980377f633ac0922edba696094f1c50bcc9bcf1d5f2cc6b9a38440c42a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.09068",
    "kind": "arxiv",
    "version": 1
  }
}