Pith Number

pith:4LUD6HG7

pith:2018:4LUD6HG7XAK4IPB3GWMFVQWGQO

not attested not anchored not stored refs pending

A note on normality of $\sqrt{2}$ in base 2

Pierpaolo Uberti

arxiv:1807.07338 v1 · 2018-07-19 · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4LUD6HG7XAK4IPB3GWMFVQWGQO}

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	2026-05-18T00:10:20.442771Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e2e83f1cdfb815c43c3b35985ac2c683bcdb02fae5e8399c7498b097d343fdad

Aliases

arxiv: 1807.07338 · arxiv_version: 1807.07338v1 · doi: 10.48550/arxiv.1807.07338 · pith_short_12: 4LUD6HG7XAK4 · pith_short_16: 4LUD6HG7XAK4IPB3 · pith_short_8: 4LUD6HG7

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/4LUD6HG7XAK4IPB3GWMFVQWGQO \
  | 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: e2e83f1cdfb815c43c3b35985ac2c683bcdb02fae5e8399c7498b097d343fdad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "addbb8dfedcc167e91a05cb66fa796cf86858971403e513bc95b852a0e4c981d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2018-07-19T10:44:24Z",
    "title_canon_sha256": "f89123883d0eecb79053970eaaab717efc5bfd31462d4e2da90979e831d8d0e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.07338",
    "kind": "arxiv",
    "version": 1
  }
}