Pith Number

pith:UE2URCB7

pith:2018:UE2URCB7YHFVZ6CQ63CGVQWSR2

not attested not anchored not stored refs pending

A doubling construction for Williamson matrices

Curtis Bright

arxiv:1803.01480 v1 · 2018-03-05 · 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{UE2URCB7YHFVZ6CQ63CGVQWSR2}

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	2026-05-18T00:22:00.542552Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a13548883fc1cb5cf850f6c46ac2d28e92d488e45f3dbb6ea5d4f75750ecfd7a

Aliases

arxiv: 1803.01480 · arxiv_version: 1803.01480v1 · doi: 10.48550/arxiv.1803.01480 · pith_short_12: UE2URCB7YHFV · pith_short_16: UE2URCB7YHFVZ6CQ · pith_short_8: UE2URCB7

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/UE2URCB7YHFVZ6CQ63CGVQWSR2 \
  | 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: a13548883fc1cb5cf850f6c46ac2d28e92d488e45f3dbb6ea5d4f75750ecfd7a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff22ab4a273559c2ed18c0f1593a8ee9336bb65b32f55910a804810e2018ca6e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-03-05T03:27:40Z",
    "title_canon_sha256": "f795378f99970a27222987cce77a98d226cde4089e3e3d88d0b3707ccd60ddd4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.01480",
    "kind": "arxiv",
    "version": 1
  }
}