Pith Number

pith:4IAEKBNW

pith:2018:4IAEKBNWKTOR5KU7OFQLANSW7Q

not attested not anchored not stored refs pending

Computing directed path-width and directed tree-width of recursively defined digraphs

Carolin Rehs, Frank Gurski

arxiv:1806.04457 v1 · 2018-06-12 · 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{4IAEKBNWKTOR5KU7OFQLANSW7Q}

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	2026-05-18T00:13:35.454078Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e2004505b654dd1eaa9f7160b03656fc02c44e982411b4956d9980a8ab04d819

Aliases

arxiv: 1806.04457 · arxiv_version: 1806.04457v1 · doi: 10.48550/arxiv.1806.04457 · pith_short_12: 4IAEKBNWKTOR · pith_short_16: 4IAEKBNWKTOR5KU7 · pith_short_8: 4IAEKBNW

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/4IAEKBNWKTOR5KU7OFQLANSW7Q \
  | 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: e2004505b654dd1eaa9f7160b03656fc02c44e982411b4956d9980a8ab04d819

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b4547e58f157c5fbb929d1ad0cf3c7218e85eb6a7ef153481fb8f940263515a7",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-06-12T12:13:47Z",
    "title_canon_sha256": "aa562ee9638da87ab5acb0b3e67eaf8d2800b52fda21ec1e001bc0f535b939c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.04457",
    "kind": "arxiv",
    "version": 1
  }
}