Pith Number

pith:T7OFDYDK

pith:2019:T7OFDYDKQ6PKJNJDVYPDGOUSBL

not attested not anchored not stored refs pending

Knot Diagrams of Treewidth Two

Alexander Grigoriev, Benjamin Burton, Fedor V. Fomin, Hans L. Bodlaender

arxiv:1904.03117 v2 · 2019-04-05 · 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{T7OFDYDKQ6PKJNJDVYPDGOUSBL}

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	2026-05-17T23:49:08.499990Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fdc51e06a879ea4b523ae1e333a920ac803b6989ccbe7035e3a82a08d248654

Aliases

arxiv: 1904.03117 · arxiv_version: 1904.03117v2 · doi: 10.48550/arxiv.1904.03117 · pith_short_12: T7OFDYDKQ6PK · pith_short_16: T7OFDYDKQ6PKJNJD · pith_short_8: T7OFDYDK

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/T7OFDYDKQ6PKJNJDVYPDGOUSBL \
  | 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: 9fdc51e06a879ea4b523ae1e333a920ac803b6989ccbe7035e3a82a08d248654

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de24f5c5362a1bbf33f0f6ed1298ea3b361634e49dadb7c9ca75ca77a3c1193c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2019-04-05T15:20:32Z",
    "title_canon_sha256": "08a255fbc6878953b00738f55d5d5b97421433f1fb2dd559e250f128eb049fee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.03117",
    "kind": "arxiv",
    "version": 2
  }
}