Pith Number

pith:57QGO55B

pith:2011:57QGO55BEHR7UXYARTTYEXKJYV

not attested not anchored not stored refs pending

On the periodic Korteweg-de Vries equation: a normal form approach

Seungly Oh

arxiv:1108.2249 v2 · 2011-08-10 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{57QGO55BEHR7UXYARTTYEXKJYV}

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	2026-05-18T04:15:15.945809Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

efe06777a121e3fa5f008ce7825d49c546ccad928684128297c9f26d9d6f2411

Aliases

arxiv: 1108.2249 · arxiv_version: 1108.2249v2 · doi: 10.48550/arxiv.1108.2249 · pith_short_12: 57QGO55BEHR7 · pith_short_16: 57QGO55BEHR7UXYA · pith_short_8: 57QGO55B

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/57QGO55BEHR7UXYARTTYEXKJYV \
  | 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: efe06777a121e3fa5f008ce7825d49c546ccad928684128297c9f26d9d6f2411

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b99b18aac95f643add1220f4046b4d7c9d70b2617050b5129ddda65c0eb5a955",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2011-08-10T19:03:13Z",
    "title_canon_sha256": "ce7e7b10cc23be821f7a1779094e64857a0282a6356f9ee25c029850d312feb1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.2249",
    "kind": "arxiv",
    "version": 2
  }
}