Pith Number

pith:P2BXZU47

pith:2008:P2BXZU47J2FDRRV62YYNHA3EQ7

not attested not anchored not stored refs pending

Hopf Bifurcations in a Watt Governor With a Spring

Denis de Carvalho Braga, Jorge Sotomayor, Luis Fernando Mello

arxiv:0802.4438 v2 · 2008-02-29 · math.DS · math.CA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P2BXZU47J2FDRRV62YYNHA3EQ7}

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	2026-05-18T02:16:00.713627Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e837cd39f4e8a38c6bed630d3836487e0f464050f7c34be09219148efa8593c

Aliases

arxiv: 0802.4438 · arxiv_version: 0802.4438v2 · doi: 10.48550/arxiv.0802.4438 · pith_short_12: P2BXZU47J2FD · pith_short_16: P2BXZU47J2FDRRV6 · pith_short_8: P2BXZU47

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/P2BXZU47J2FDRRV62YYNHA3EQ7 \
  | 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: 7e837cd39f4e8a38c6bed630d3836487e0f464050f7c34be09219148efa8593c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "316d80550a87858f4e4abdfed4aa6dd255dafce6100c811c7c057dd479307701",
    "cross_cats_sorted": [
      "math.CA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2008-02-29T18:09:46Z",
    "title_canon_sha256": "4234a5dd300c3122759acdec74566b69d1e8787c6e8b2bd1e8b0cac334b4a226"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.4438",
    "kind": "arxiv",
    "version": 2
  }
}