Pith Number

pith:VSLRC5UC

pith:2016:VSLRC5UCUDGTVQVZHFZXX2S6C3

not attested not anchored not stored refs pending

A geometric proof of Wilbrink's characterization of even order classical unitals

Alice M. W. Hui

arxiv:1603.07557 v1 · 2016-03-24 · math.SG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VSLRC5UCUDGTVQVZHFZXX2S6C3}

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	2026-05-18T01:18:20.564583Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac97117682a0cd3ac2b939737bea5e16e918ac179a3473611bbfa0df2975cf79

Aliases

arxiv: 1603.07557 · arxiv_version: 1603.07557v1 · doi: 10.48550/arxiv.1603.07557 · pith_short_12: VSLRC5UCUDGT · pith_short_16: VSLRC5UCUDGTVQVZ · pith_short_8: VSLRC5UC

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/VSLRC5UCUDGTVQVZHFZXX2S6C3 \
  | 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: ac97117682a0cd3ac2b939737bea5e16e918ac179a3473611bbfa0df2975cf79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac19dec354490a39a8d080e4a88c542b063b9a045a8e02ea4b3092b7ea61c41f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2016-03-24T13:13:08Z",
    "title_canon_sha256": "1ba4fcb56ca0ad2bc3217432eeb090298695beb597ab324c378b39e25004c9b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.07557",
    "kind": "arxiv",
    "version": 1
  }
}