Pith Number

pith:4GU3CWY7

pith:2009:4GU3CWY7C54UF3UEW25UAFH7DS

not attested not anchored not stored refs pending

A Symbolic Algorithm for Computing Recursion Operators of Nonlinear PDEs

D.E. Baldwin, W. Hereman

arxiv:0905.2499 v1 · 2009-05-15 · nlin.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4GU3CWY7C54UF3UEW25UAFH7DS}

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	2026-05-18T03:37:09.529328Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1a9b15b1f177942ee84b6bb4014ff1c8faa60f47324e69039a38abe532e0370

Aliases

arxiv: 0905.2499 · arxiv_version: 0905.2499v1 · doi: 10.48550/arxiv.0905.2499 · pith_short_12: 4GU3CWY7C54U · pith_short_16: 4GU3CWY7C54UF3UE · pith_short_8: 4GU3CWY7

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/4GU3CWY7C54UF3UEW25UAFH7DS \
  | 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: e1a9b15b1f177942ee84b6bb4014ff1c8faa60f47324e69039a38abe532e0370

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "484157e08f4a9552798943894325e214f4c9c0ade64a62457972ea396702d819",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.SI",
    "submitted_at": "2009-05-15T09:57:53Z",
    "title_canon_sha256": "1b93f17fe05456f2357a06f361be5bfb0227689240a252f8b2a5e09794070701"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.2499",
    "kind": "arxiv",
    "version": 1
  }
}