Pith Number

pith:YXU3TC2W

pith:2000:YXU3TC2WQ6FTF653AEC4MAPEGR

not attested not anchored not stored refs pending

Parametrically Excited Hamiltonian Partial Differential Equations

Eduard Kirr, Michael I. Weinstein

arxiv:nlin/0012021 v1 · 2000-12-11 · nlin.PS · nlin.CD

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YXU3TC2WQ6FTF653AEC4MAPEGR}

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	2026-07-04T15:51:33.651244Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5e9b98b56878b32fbbb0105c601e4347b19cf5927578e138a64e76b25557ea0

Aliases

arxiv: nlin/0012021 · arxiv_version: nlin/0012021v1 · doi: 10.48550/arxiv.nlin/0012021 · pith_short_12: YXU3TC2WQ6FT · pith_short_16: YXU3TC2WQ6FTF653 · pith_short_8: YXU3TC2W

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/YXU3TC2WQ6FTF653AEC4MAPEGR \
  | 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: c5e9b98b56878b32fbbb0105c601e4347b19cf5927578e138a64e76b25557ea0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "07f15fbe1d62847244791d43f9723ef6a35eaa5810f35e50b26cfedc8539e36e",
    "cross_cats_sorted": [
      "nlin.CD"
    ],
    "license": "",
    "primary_cat": "nlin.PS",
    "submitted_at": "2000-12-11T04:17:21Z",
    "title_canon_sha256": "39c2237f1bfbefe3639252d3e7c00895d7c58e6a134918e837f7b949d2724ade"
  },
  "schema_version": "1.0",
  "source": {
    "id": "nlin/0012021",
    "kind": "arxiv",
    "version": 1
  }
}