Pith Number

pith:2FMDL7R7

pith:2014:2FMDL7R7DOEMWDFGOBYIOZMWVQ

not attested not anchored not stored refs pending

Set Families with Low Pairwise Intersection

Calvin Beideman, Jeremiah Blocki

arxiv:1404.4622 v1 · 2014-04-17 · cs.CC · 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{2FMDL7R7DOEMWDFGOBYIOZMWVQ}

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	2026-05-18T02:54:03.824922Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d15835fe3f1b88cb0ca67070876596ac23f2413b05ae36fb8ea0c9ac80357f2d

Aliases

arxiv: 1404.4622 · arxiv_version: 1404.4622v1 · doi: 10.48550/arxiv.1404.4622 · pith_short_12: 2FMDL7R7DOEM · pith_short_16: 2FMDL7R7DOEMWDFG · pith_short_8: 2FMDL7R7

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/2FMDL7R7DOEMWDFGOBYIOZMWVQ \
  | 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: d15835fe3f1b88cb0ca67070876596ac23f2413b05ae36fb8ea0c9ac80357f2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d63aefcc5c5b94e0c30bc5c12331eef6a1a85b6633715a679f3f9301b2da2b3c",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2014-04-17T19:38:20Z",
    "title_canon_sha256": "0b480a72a843579656854601a85eb4111b81b1554cfe6c937b3a6806d277291b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.4622",
    "kind": "arxiv",
    "version": 1
  }
}