Pith Number

pith:KIKJ7EVH

pith:2019:KIKJ7EVH4ADOLCWGELVHFDG6FA

not attested not anchored not stored refs pending

Collapsibility of non-cover complexes of graphs

Boram Park, Ilkyoo Choi, Jinha Kim

arxiv:1904.10320 v1 · 2019-04-23 · 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{KIKJ7EVH4ADOLCWGELVHFDG6FA}

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	2026-05-17T23:47:54.460021Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

52149f92a7e006e58ac622ea728cde281af0549fd9de60395f773a535a050010

Aliases

arxiv: 1904.10320 · arxiv_version: 1904.10320v1 · doi: 10.48550/arxiv.1904.10320 · pith_short_12: KIKJ7EVH4ADO · pith_short_16: KIKJ7EVH4ADOLCWG · pith_short_8: KIKJ7EVH

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/KIKJ7EVH4ADOLCWGELVHFDG6FA \
  | 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: 52149f92a7e006e58ac622ea728cde281af0549fd9de60395f773a535a050010

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "57571b4679c9c0cf4705a0a423acc2b2760a674f0372b5ddd14f5d1b3311e632",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-04-23T13:37:29Z",
    "title_canon_sha256": "9e602e9bf0c0777b4c55fd8b4bdd5e0d86a91cba5d779c51a5dd2fc74295c8ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.10320",
    "kind": "arxiv",
    "version": 1
  }
}