Pith Number

pith:R4PT4L76

pith:2019:R4PT4L76HKEYI2DBQIFTIT7ZAD

not attested not anchored not stored refs pending

V.I. Arnold's "pointwise" KAM Theorem

Comlan Edmond Koudjinan, Luigi Chierchia

arxiv:1908.02523 v2 · 2019-08-07 · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R4PT4L76HKEYI2DBQIFTIT7ZAD}

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	2026-07-05T00:31:54.953074Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f1f3e2ffe3a89846861820b344ff900ff63bb987f49ab4f9bdd51d94266d335

Aliases

arxiv: 1908.02523 · arxiv_version: 1908.02523v2 · doi: 10.48550/arxiv.1908.02523 · pith_short_12: R4PT4L76HKEY · pith_short_16: R4PT4L76HKEYI2DB · pith_short_8: R4PT4L76

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/R4PT4L76HKEYI2DBQIFTIT7ZAD \
  | 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: 8f1f3e2ffe3a89846861820b344ff900ff63bb987f49ab4f9bdd51d94266d335

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df3048c117bddcfe71a0e06bba83849ea6173a1d5ab9b8372314e5631a3e2e2c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2019-08-07T10:48:54Z",
    "title_canon_sha256": "ff8d83cc5a101f18c75d5d33df6511d952c51133f7972e09c6d7121df18910fa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.02523",
    "kind": "arxiv",
    "version": 2
  }
}