Pith Number

pith:H4WMW47A

pith:2011:H4WMW47A3CLW7Q26IB2WCKTUQV

not attested not anchored not stored refs pending

An efficient polynomial-time approximation scheme for Steiner forest in planar graphs

Claire Mathieu, David Eisenstat, Philip Klein

arxiv:1110.1320 v2 · 2011-10-06 · 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{H4WMW47A3CLW7Q26IB2WCKTUQV}

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	2026-05-18T04:10:23.187616Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f2ccb73e0d8976fc35e4075612a7485548fe9685100bee335ae248cb0e690f7

Aliases

arxiv: 1110.1320 · arxiv_version: 1110.1320v2 · doi: 10.48550/arxiv.1110.1320 · pith_short_12: H4WMW47A3CLW · pith_short_16: H4WMW47A3CLW7Q26 · pith_short_8: H4WMW47A

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/H4WMW47A3CLW7Q26IB2WCKTUQV \
  | 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: 3f2ccb73e0d8976fc35e4075612a7485548fe9685100bee335ae248cb0e690f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "716a66fadc36ea780e3c11a96638022e8b39f66139781182b41c2abb1868ebbb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-10-06T16:51:57Z",
    "title_canon_sha256": "d41f6e21db152f6b0f27510c5f59e470e6fd8600b70c4c9db0e1eab4df180ddf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.1320",
    "kind": "arxiv",
    "version": 2
  }
}