Pith Number

pith:WPUPPXYA

pith:2008:WPUPPXYA3ES66ROIY66UEACZKQ

not attested not anchored not stored refs pending

Search Space Contraction in Canonical Labeling of Graphs

Adolfo Piperno

arxiv:0804.4881 v2 · 2008-04-30 · cs.DS · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WPUPPXYA3ES66ROIY66UEACZKQ}

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.

Cited by

1 paper in Pith

Combining the Connection Scan Algorithm with Contraction Hierarchies

Receipt and verification

First computed	2026-05-18T02:24:57.375033Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3e8f7df00d925ef45c8c7bd4200595436e090c18266c31ad515c299b836d049

Aliases

arxiv: 0804.4881 · arxiv_version: 0804.4881v2 · doi: 10.48550/arxiv.0804.4881 · pith_short_12: WPUPPXYA3ES6 · pith_short_16: WPUPPXYA3ES66ROI · pith_short_8: WPUPPXYA

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/WPUPPXYA3ES66ROIY66UEACZKQ \
  | 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: b3e8f7df00d925ef45c8c7bd4200595436e090c18266c31ad515c299b836d049

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d74d14520cebf5c785243fb1426d167effee67f491a248d3c300f83ec1cba936",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2008-04-30T18:28:13Z",
    "title_canon_sha256": "25f0996fc330a36362c075c850bcd5bc3f248d311103a2fa2dd83a53f91ea1c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.4881",
    "kind": "arxiv",
    "version": 2
  }
}