Pith Number

pith:W27MDRQO

pith:2012:W27MDRQO23MLC2FDJ55TM6DVQO

not attested not anchored not stored refs pending

A Parameterized Approximation Algorithm for The Shallow-Light Steiner Tree Problem

Kewen Liao, Longkun Guo

arxiv:1212.3403 v2 · 2012-12-14 · 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{W27MDRQO23MLC2FDJ55TM6DVQO}

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	2026-05-18T03:14:19.889522Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b6bec1c60ed6d8b168a34f7b36787583a8eee8fb3a67cabe9587167159970f16

Aliases

arxiv: 1212.3403 · arxiv_version: 1212.3403v2 · doi: 10.48550/arxiv.1212.3403 · pith_short_12: W27MDRQO23ML · pith_short_16: W27MDRQO23MLC2FD · pith_short_8: W27MDRQO

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/W27MDRQO23MLC2FDJ55TM6DVQO \
  | 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: b6bec1c60ed6d8b168a34f7b36787583a8eee8fb3a67cabe9587167159970f16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4137462cb5b55e6b8f9585033578af9f65b00137bf122c86ff7d4e7c0e99dcf7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-12-14T07:23:08Z",
    "title_canon_sha256": "acfd461bd93ce404ff0c5b5537028c78d5c506c1133bc428130079bebb00a907"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.3403",
    "kind": "arxiv",
    "version": 2
  }
}