Pith Number

pith:OVADEFN5

pith:2019:OVADEFN5HH3P2CTQVB4LPLI2EA

not attested not anchored not stored refs pending

Failure of rational approximation on some Cantor type sets

Albert Mas

arxiv:1902.06233 v1 · 2019-02-17 · math.CA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OVADEFN5HH3P2CTQVB4LPLI2EA}

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	2026-05-17T23:53:46.184171Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75403215bd39f6fd0a70a878b7ad1a2021d7914f8fc75f8b87651934f7cd9f98

Aliases

arxiv: 1902.06233 · arxiv_version: 1902.06233v1 · doi: 10.48550/arxiv.1902.06233 · pith_short_12: OVADEFN5HH3P · pith_short_16: OVADEFN5HH3P2CTQ · pith_short_8: OVADEFN5

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/OVADEFN5HH3P2CTQVB4LPLI2EA \
  | 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: 75403215bd39f6fd0a70a878b7ad1a2021d7914f8fc75f8b87651934f7cd9f98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "656b93f74233cc4c9caa98cd5ba23fb0935bca34f2705a7631319d7d4eb805df",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2019-02-17T10:03:03Z",
    "title_canon_sha256": "a9a4e7f5b654cd1f3276e33fde152add40c106842d2cad1eec97e244118f2c7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.06233",
    "kind": "arxiv",
    "version": 1
  }
}