Pith Number

pith:ZMFRU43F

pith:2011:ZMFRU43F24T2LPKC2SFN66HPWA

not attested not anchored not stored refs pending

Nonexistence Results for Tight Block Designs

Jesse Short-Gershman, Peter Dukes

arxiv:1110.3463 v1 · 2011-10-16 · 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{ZMFRU43F24T2LPKC2SFN66HPWA}

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	2026-05-18T04:10:55.654641Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cb0b1a7365d727a5bd42d48adf78efb034ff98b003875421a4ae5dd38234351a

Aliases

arxiv: 1110.3463 · arxiv_version: 1110.3463v1 · doi: 10.48550/arxiv.1110.3463 · pith_short_12: ZMFRU43F24T2 · pith_short_16: ZMFRU43F24T2LPKC · pith_short_8: ZMFRU43F

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/ZMFRU43F24T2LPKC2SFN66HPWA \
  | 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: cb0b1a7365d727a5bd42d48adf78efb034ff98b003875421a4ae5dd38234351a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "efd168bcb06dfdab8c798175fc85f35169692cbdb38404fe4a06018ee018338c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-10-16T07:58:40Z",
    "title_canon_sha256": "01315d987873f64befa241d21a531ea7448e82fe90fe86dc1761e05752451d7c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.3463",
    "kind": "arxiv",
    "version": 1
  }
}