Pith Number

pith:JLJERQKY

pith:2011:JLJERQKYYO4QIDOAJ6LT7CFEPS

not attested not anchored not stored refs pending

Branches of forced oscillations for a class of constrained ODEs: a topological approach

Alessandro Calamai, Marco Spadini

arxiv:1102.1562 v2 · 2011-02-08 · 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{JLJERQKYYO4QIDOAJ6LT7CFEPS}

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	2026-05-18T03:59:01.602698Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ad248c158c3b9040dc04f973f88a47ca08360e5f9b33c175cedddba59e62923

Aliases

arxiv: 1102.1562 · arxiv_version: 1102.1562v2 · doi: 10.48550/arxiv.1102.1562 · pith_short_12: JLJERQKYYO4Q · pith_short_16: JLJERQKYYO4QIDOA · pith_short_8: JLJERQKY

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/JLJERQKYYO4QIDOAJ6LT7CFEPS \
  | 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: 4ad248c158c3b9040dc04f973f88a47ca08360e5f9b33c175cedddba59e62923

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d4382fbe0c896329fd94bf070898a7890c1f01f6e0833501daa0311e6d33682",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2011-02-08T10:40:14Z",
    "title_canon_sha256": "527cdaeada39c13c8bad1ca15c54dbec55a9b10620475e78ad5a8b05637284a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.1562",
    "kind": "arxiv",
    "version": 2
  }
}