Pith Number

pith:RXHBPUN4

pith:2018:RXHBPUN4EXQLJZFP3NUMK7SL7N

not attested not anchored not stored refs pending

Using the existence of t-designs to prove Erd\H{o}s-Ko-Rado

Chris Godsil, Krystal Guo

arxiv:1802.03444 v1 · 2018-02-09 · 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{RXHBPUN4EXQLJZFP3NUMK7SL7N}

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	2026-05-18T00:23:51.619958Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8dce17d1bc25e0b4e4afdb68c57e4bfb61d76ec2f4a83e08e7dfbc3e0ab5e9cd

Aliases

arxiv: 1802.03444 · arxiv_version: 1802.03444v1 · doi: 10.48550/arxiv.1802.03444 · pith_short_12: RXHBPUN4EXQL · pith_short_16: RXHBPUN4EXQLJZFP · pith_short_8: RXHBPUN4

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/RXHBPUN4EXQLJZFP3NUMK7SL7N \
  | 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: 8dce17d1bc25e0b4e4afdb68c57e4bfb61d76ec2f4a83e08e7dfbc3e0ab5e9cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c3ea75896b3f2c5013407c0131a03b677255b192fffff1f7adbcb87e92f7ce9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-02-09T20:39:08Z",
    "title_canon_sha256": "5950c94c80245664a5c10218c963b02d9e683c209e0060cd671a361cc9d8bbf6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03444",
    "kind": "arxiv",
    "version": 1
  }
}