Pith Number

pith:QUAIHEIC

pith:2019:QUAIHEICG7KS5B7D57FYUVWCUX

not attested not anchored not stored refs pending

A Constraint Model for the Tree Decomposition of a Graph

Benjamin Bumpus, James Trimble, Patrick Prosser

arxiv:1908.02530 v1 · 2019-08-07 · cs.DM · cs.CC · 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{QUAIHEICG7KS5B7D57FYUVWCUX}

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	2026-07-04T23:52:09.973477Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

850083910237d52e87e3efcb8a56c2a5ff19e8b364dedb7df74ebffbac569c88

Aliases

arxiv: 1908.02530 · arxiv_version: 1908.02530v1 · doi: 10.48550/arxiv.1908.02530 · pith_short_12: QUAIHEICG7KS · pith_short_16: QUAIHEICG7KS5B7D · pith_short_8: QUAIHEIC

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/QUAIHEICG7KS5B7D57FYUVWCUX \
  | 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: 850083910237d52e87e3efcb8a56c2a5ff19e8b364dedb7df74ebffbac569c88

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d51f87e96e0435bf519112b6fae971ce784953a7f003e867b6bc196d3dc0208b",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2019-08-07T11:18:27Z",
    "title_canon_sha256": "ee528744ef692626b18f6b35cd8c297dd58a1b1572cfba5b7c81e4d5a0249772"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.02530",
    "kind": "arxiv",
    "version": 1
  }
}