Pith Number

pith:4IUYDU5E

pith:2018:4IUYDU5E7MGFPKGNWGYJV6LIQZ

not attested not anchored not stored refs pending

An improved isomorphism test for bounded-tree-width graphs

Daniel Neuen, Daniel Wiebking, Martin Grohe, Pascal Schweitzer

arxiv:1803.06858 v1 · 2018-03-19 · cs.DS · cs.DM · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4IUYDU5E7MGFPKGNWGYJV6LIQZ}

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	2026-05-18T00:20:41.129217Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e22981d3a4fb0c57a8cdb1b09af96886595388b509abdedeeb326046903d100c

Aliases

arxiv: 1803.06858 · arxiv_version: 1803.06858v1 · doi: 10.48550/arxiv.1803.06858 · pith_short_12: 4IUYDU5E7MGF · pith_short_16: 4IUYDU5E7MGFPKGN · pith_short_8: 4IUYDU5E

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/4IUYDU5E7MGFPKGNWGYJV6LIQZ \
  | 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: e22981d3a4fb0c57a8cdb1b09af96886595388b509abdedeeb326046903d100c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c1c17069ea5ef8f52b70564c9f53809065fddd984e3bd772839099d09e27379",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-03-19T10:28:48Z",
    "title_canon_sha256": "0c730aceb88000c35431c9e261421a4e9a79245516ab8d15d25dd18ca49e3471"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.06858",
    "kind": "arxiv",
    "version": 1
  }
}