Pith Number

pith:7UOKYJXT

pith:2018:7UOKYJXTU5PTNZYWRNTVTV5Z7D

not attested not anchored not stored refs pending

The Erd\H{o}s-Ko-Rado property of trees of depth two

Carl Feghali

arxiv:1811.04902 v6 · 2018-11-12 · 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{7UOKYJXTU5PTNZYWRNTVTV5Z7D}

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	2026-05-17T23:40:55.704545Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd1cac26f3a75f36e7168b6759d7b9f8d49143d8b78ea560d274c293d424de49

Aliases

arxiv: 1811.04902 · arxiv_version: 1811.04902v6 · doi: 10.48550/arxiv.1811.04902 · pith_short_12: 7UOKYJXTU5PT · pith_short_16: 7UOKYJXTU5PTNZYW · pith_short_8: 7UOKYJXT

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/7UOKYJXTU5PTNZYWRNTVTV5Z7D \
  | 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: fd1cac26f3a75f36e7168b6759d7b9f8d49143d8b78ea560d274c293d424de49

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0068ef1b6e33928ca57d8b6b5feffcf0e1c5e38b02c48f29d5504bda0e79acfd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-11-12T18:41:49Z",
    "title_canon_sha256": "b8b1cd93d6115f6118a91c27ddb2410edc327b0512277204b38366c7429139b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.04902",
    "kind": "arxiv",
    "version": 6
  }
}