Pith Number

pith:5SY4UQVP

pith:2018:5SY4UQVPJWSYN7TMBD3XTBMTIS

not attested not anchored not stored refs pending

Weighted proper orientations of trees and graphs of bounded treewidth

Ana Silva, Cl\'audia Linhares Sales, Ignasi Sau, J\'ulio Ara\'ujo

arxiv:1804.03884 v1 · 2018-04-11 · cs.DS · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5SY4UQVPJWSYN7TMBD3XTBMTIS}

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	2026-05-18T00:18:42.791426Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ecb1ca42af4da586fe6c08f779859344ad68c762ca836ebc1c68193fdab4ab0b

Aliases

arxiv: 1804.03884 · arxiv_version: 1804.03884v1 · doi: 10.48550/arxiv.1804.03884 · pith_short_12: 5SY4UQVPJWSY · pith_short_16: 5SY4UQVPJWSYN7TM · pith_short_8: 5SY4UQVP

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/5SY4UQVPJWSYN7TMBD3XTBMTIS \
  | 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: ecb1ca42af4da586fe6c08f779859344ad68c762ca836ebc1c68193fdab4ab0b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1129ba4902b1acb8473232af62c0605b261d07f7f10a889ece510d33f944718",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-04-11T09:16:44Z",
    "title_canon_sha256": "8976c852e8038a011cef5a1b396214e6c8f96d697e743715b8942145392848ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.03884",
    "kind": "arxiv",
    "version": 1
  }
}