Pith Number

pith:YYYMSQDG

pith:2019:YYYMSQDGBTVPPK7OEEACZB5PSX

not attested not anchored not stored refs pending

Combinatorial $t$-designs from special polynomials

Chunming Tang, Cunsheng Ding

arxiv:1903.07375 v1 · 2019-03-18 · 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{YYYMSQDGBTVPPK7OEEACZB5PSX}

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	2026-05-17T23:51:01.587707Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c630c940660ceaf7abee21002c87af95e5f477c4e3ec7915a84ecab11d5a9ec5

Aliases

arxiv: 1903.07375 · arxiv_version: 1903.07375v1 · doi: 10.48550/arxiv.1903.07375 · pith_short_12: YYYMSQDGBTVP · pith_short_16: YYYMSQDGBTVPPK7O · pith_short_8: YYYMSQDG

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/YYYMSQDGBTVPPK7OEEACZB5PSX \
  | 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: c630c940660ceaf7abee21002c87af95e5f477c4e3ec7915a84ecab11d5a9ec5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "298a58db5d40545834fffcae17acb8a0aaa04e95f9d16ebdabe54976c08d90fd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-03-18T11:47:15Z",
    "title_canon_sha256": "2cbd23c9ddf95c8511540262dd7e292dc8979c575f010930d6fd41488de9a1b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.07375",
    "kind": "arxiv",
    "version": 1
  }
}