Pith Number

pith:CHSAOQ3C

pith:1999:CHSAOQ3CXN4YOEJYZI2MURNZ4M

not attested not anchored not stored refs pending

Symmetries of a class of nonlinear fourth order partial differential equations

Peter A. Clarkson, Thomas J. Priestley

arxiv:math/9901154 v1 · 1999-01-01 · 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{CHSAOQ3CXN4YOEJYZI2MURNZ4M}

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	2026-05-18T01:38:22.658638Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11e4074362bb79871138ca34ca45b9e3124e885ca3c9786066d2ab13a6d73a87

Aliases

arxiv: math/9901154 · arxiv_version: math/9901154v1 · doi: 10.48550/arxiv.math/9901154 · pith_short_12: CHSAOQ3CXN4Y · pith_short_16: CHSAOQ3CXN4YOEJY · pith_short_8: CHSAOQ3C

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/CHSAOQ3CXN4YOEJYZI2MURNZ4M \
  | 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: 11e4074362bb79871138ca34ca45b9e3124e885ca3c9786066d2ab13a6d73a87

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d8d09fb669ecf6d98cf0ea2bd1f4bf52f02a19c14cd3f92bc165076a62c2525",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AP",
    "submitted_at": "1999-01-01T00:00:00Z",
    "title_canon_sha256": "ce72ea68dce19a0cda110ffa93359511f9a69ab010fd5fc694be3654c9c35bfc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9901154",
    "kind": "arxiv",
    "version": 1
  }
}