Pith Number

pith:GHULOPBN

pith:2018:GHULOPBNOMHTJ2CKA3YE4FJVMZ

not attested not anchored not stored refs pending

Notes on well-distributed minimal sub-BIBDs for $\lambda=1$

Daniele Dona

arxiv:1803.10545 v2 · 2018-03-28 · 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{GHULOPBNOMHTJ2CKA3YE4FJVMZ}

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	2026-05-18T00:06:28.859204Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31e8b73c2d730f34e84a06f04e153566427b455023ab26cd1785a7df86817360

Aliases

arxiv: 1803.10545 · arxiv_version: 1803.10545v2 · doi: 10.48550/arxiv.1803.10545 · pith_short_12: GHULOPBNOMHT · pith_short_16: GHULOPBNOMHTJ2CK · pith_short_8: GHULOPBN

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/GHULOPBNOMHTJ2CKA3YE4FJVMZ \
  | 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: 31e8b73c2d730f34e84a06f04e153566427b455023ab26cd1785a7df86817360

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e2293f4db075bbc3ec5ebbe03b23f89030c13376562cfab83f6c53e42928fca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-03-28T11:48:47Z",
    "title_canon_sha256": "5d49559f4439f5f7cc16b41b57e3e8ffd1d0312ddeda6c2454c8a204deaa93ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.10545",
    "kind": "arxiv",
    "version": 2
  }
}