Pith Number

pith:QQTGSK6B

pith:2009:QQTGSK6B42UHVYTAV6C7S3HEST

not attested not anchored not stored refs pending

The Degasperis-Procesi equation as a non-metric Euler equation

Boris Kolev (LATP), Joachim Escher (IFAM)

arxiv:0908.0508 v1 · 2009-08-04 · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QQTGSK6B42UHVYTAV6C7S3HEST}

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	2026-05-18T04:05:15.236722Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8426692bc1e6a87ae260af85f96ce494fcc1566a391586426ed24bf0601cf85f

Aliases

arxiv: 0908.0508 · arxiv_version: 0908.0508v1 · doi: 10.48550/arxiv.0908.0508 · pith_short_12: QQTGSK6B42UH · pith_short_16: QQTGSK6B42UHVYTA · pith_short_8: QQTGSK6B

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/QQTGSK6B42UHVYTAV6C7S3HEST \
  | 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: 8426692bc1e6a87ae260af85f96ce494fcc1566a391586426ed24bf0601cf85f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6263914848fb5169e15163b8c4e0164d67b5e00d8628cfe11832d785661fe921",
    "cross_cats_sorted": [
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2009-08-04T18:41:38Z",
    "title_canon_sha256": "8cca934bd472c1703d5b5d2012af40b63310532f41612f8f784292fae6084056"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.0508",
    "kind": "arxiv",
    "version": 1
  }
}