Pith Number

pith:UG7STBQW

pith:2008:UG7STBQWYDOTSERTCYMOIGZT4R

not attested not anchored not stored refs pending

Quadratic Volume-Preserving Maps: Invariant Circles and Bifurcations

Holger R. Dullin, James D. Meiss

arxiv:0807.0678 v1 · 2008-07-04 · 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{UG7STBQWYDOTSERTCYMOIGZT4R}

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	2026-05-18T03:20:19.257281Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1bf298616c0dd3912331618e41b33e443a3cb189d11ad97e748bb311f2aaff1

Aliases

arxiv: 0807.0678 · arxiv_version: 0807.0678v1 · doi: 10.48550/arxiv.0807.0678 · pith_short_12: UG7STBQWYDOT · pith_short_16: UG7STBQWYDOTSERT · pith_short_8: UG7STBQW

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/UG7STBQWYDOTSERTCYMOIGZT4R \
  | 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: a1bf298616c0dd3912331618e41b33e443a3cb189d11ad97e748bb311f2aaff1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2b1542e2f7b2ee8539eea9b1d957b99a50bd9aa1db8a5abdca7a4d10cb0e27d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.CD",
    "submitted_at": "2008-07-04T04:19:40Z",
    "title_canon_sha256": "370e51ef6a88c4bad8bbf2c27efedbdbc25c094fe068993fb84792f2d37694fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.0678",
    "kind": "arxiv",
    "version": 1
  }
}