Pith Number

pith:7DWXY4SC

pith:2009:7DWXY4SCKJ3TGIPBZS2QQQMITK

not attested not anchored not stored refs pending

Yet another proof from the Book: the Gauss theorem on regular polygons

A. Skopenkov

arxiv:0908.2029 v6 · 2009-08-14 · math.HO · math.AC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7DWXY4SCKJ3TGIPBZS2QQQMITK}

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	2026-05-18T03:13:56.656037Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8ed7c724252773321e1ccb50841889a8fccfb235456642d399087e25ae947ca

Aliases

arxiv: 0908.2029 · arxiv_version: 0908.2029v6 · doi: 10.48550/arxiv.0908.2029 · pith_short_12: 7DWXY4SCKJ3T · pith_short_16: 7DWXY4SCKJ3TGIPB · pith_short_8: 7DWXY4SC

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/7DWXY4SCKJ3TGIPBZS2QQQMITK \
  | 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: f8ed7c724252773321e1ccb50841889a8fccfb235456642d399087e25ae947ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb0e4f4cd0343ec17c9bc6c75506ecca60cd12e73c26f029a8ec428d0b9cd2d8",
    "cross_cats_sorted": [
      "math.AC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2009-08-14T09:48:19Z",
    "title_canon_sha256": "35bdc62bf75e5ec329f61460c17d0c1e19239d74172f00e39c61138712fa6a7d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.2029",
    "kind": "arxiv",
    "version": 6
  }
}