Pith Number

pith:DDQUVFDC

pith:2015:DDQUVFDCUHTCEQTCKQVKXTTYR4

not attested not anchored not stored refs pending

Symplectic integrators for the matrix Hill's equation and its applications to engineering models

Enrique Ponsoda, Muaz Seydao\u{g}lu, Philipp Bader, Sergio Blanes

arxiv:1512.02343 v1 · 2015-12-08 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DDQUVFDCUHTCEQTCKQVKXTTYR4}

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	2026-05-18T01:24:44.869912Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18e14a9462a1e6224262542aabce788f07d3e109002da9a8097bee7d5b3edbea

Aliases

arxiv: 1512.02343 · arxiv_version: 1512.02343v1 · doi: 10.48550/arxiv.1512.02343 · pith_short_12: DDQUVFDCUHTC · pith_short_16: DDQUVFDCUHTCEQTC · pith_short_8: DDQUVFDC

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/DDQUVFDCUHTCEQTCKQVKXTTYR4 \
  | 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: 18e14a9462a1e6224262542aabce788f07d3e109002da9a8097bee7d5b3edbea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "21953b5f0060cdd55c884b102b448e03bd3614c4c0e258d96d03eab16e235863",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-12-08T06:05:59Z",
    "title_canon_sha256": "21414f877e1cebfde7414e6f8813e4cee9d64338c8d0f69154d9294b7d374c09"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.02343",
    "kind": "arxiv",
    "version": 1
  }
}