Pith Number

pith:LTPEW6TJ

pith:2019:LTPEW6TJNYITYO7VGLZQL3FUHV

not attested not anchored not stored refs pending

Cyclewidth and the Grid Theorem for Perfect Matching Width of Bipartite Graphs

Meike Hatzel, Roman Rabinovich, Sebastian Wiederrecht

arxiv:1902.01322 v3 · 2019-02-04 · math.CO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LTPEW6TJNYITYO7VGLZQL3FUHV}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-17T23:54:02.119945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5cde4b7a696e113c3bf532f305ecb43d5a823eca894fe0e92bf425b6fd7be472

Aliases

arxiv: 1902.01322 · arxiv_version: 1902.01322v3 · doi: 10.48550/arxiv.1902.01322 · pith_short_12: LTPEW6TJNYIT · pith_short_16: LTPEW6TJNYITYO7V · pith_short_8: LTPEW6TJ

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/LTPEW6TJNYITYO7VGLZQL3FUHV \
  | 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: 5cde4b7a696e113c3bf532f305ecb43d5a823eca894fe0e92bf425b6fd7be472

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dca502cd99c02d3ba2e80e31f97a7db238478748403fcc7447ddb02c0733e7c3",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-02-04T17:18:50Z",
    "title_canon_sha256": "1b28ffcd5fb48fc16d72095cb4453fcde7628db806c2597ed3095d19b9d8e73d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.01322",
    "kind": "arxiv",
    "version": 3
  }
}