Pith Number

pith:MYVPEHK3

pith:2019:MYVPEHK35BD2NQPTO7RQQ7P3XF

not attested not anchored not stored refs pending

Collapsibility of noncover complexes of chordal graphs

Jinha Kim

arxiv:1904.04519 v1 · 2019-04-09 · 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{MYVPEHK35BD2NQPTO7RQQ7P3XF}

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	2026-05-17T23:48:58.863728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

662af21d5be847a6c1f377e3087dfbb95ee10545ed4a83ec8a3c9455f8b2e225

Aliases

arxiv: 1904.04519 · arxiv_version: 1904.04519v1 · doi: 10.48550/arxiv.1904.04519 · pith_short_12: MYVPEHK35BD2 · pith_short_16: MYVPEHK35BD2NQPT · pith_short_8: MYVPEHK3

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/MYVPEHK35BD2NQPTO7RQQ7P3XF \
  | 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: 662af21d5be847a6c1f377e3087dfbb95ee10545ed4a83ec8a3c9455f8b2e225

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d3ab6e7d5c45025e96071ba5c3f715b816a8e7591642eef69b24e3821d9c253",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-04-09T08:24:51Z",
    "title_canon_sha256": "99a1f955e58fdc709f019b622f487e3e37e70f89f60ec04efabb77871cff80f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.04519",
    "kind": "arxiv",
    "version": 1
  }
}