Pith Number

pith:PIVZTU6G

pith:2017:PIVZTU6GCYGHP73HBJ5EP3OUJU

not attested not anchored not stored refs pending

High order analysis of the limit cycle of the van der Pol oscillator

Francisco M. Fern\'andez, John P. Boyd, Paolo Amore

arxiv:1711.09978 v1 · 2017-11-28 · 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{PIVZTU6GCYGHP73HBJ5EP3OUJU}

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	2026-05-18T00:21:21.343650Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a2b99d3c6160c77ff670a7a47edd44d284955f957db881f625e58c50cc00734

Aliases

arxiv: 1711.09978 · arxiv_version: 1711.09978v1 · doi: 10.48550/arxiv.1711.09978 · pith_short_12: PIVZTU6GCYGH · pith_short_16: PIVZTU6GCYGHP73H · pith_short_8: PIVZTU6G

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/PIVZTU6GCYGHP73HBJ5EP3OUJU \
  | 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: 7a2b99d3c6160c77ff670a7a47edd44d284955f957db881f625e58c50cc00734

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b63d7654151cdf4fdec83ed533ea82082919484aca1b0cb89287c07b6ee0a1c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-11-28T13:01:43Z",
    "title_canon_sha256": "12411986c9d4ad1f05ab733357d032fa003fc861c5bb4e65de42278de2fdaff5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.09978",
    "kind": "arxiv",
    "version": 1
  }
}