Pith Number

pith:OQ5CPWOK

pith:2015:OQ5CPWOK4GBKFVCGKPOXXOXUPH

not attested not anchored not stored refs pending

Periodic impact motions at resonance of a particle bouncing on spheres and cylinders

Andrea Sfecci

arxiv:1504.03457 v1 · 2015-04-14 · math.CA · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OQ5CPWOK4GBKFVCGKPOXXOXUPH}

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	2026-05-18T00:31:22.871293Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

743a27d9cae182a2d44653dd7bbaf479e34413169dd706c6f5f196810e8f4fbf

Aliases

arxiv: 1504.03457 · arxiv_version: 1504.03457v1 · doi: 10.48550/arxiv.1504.03457 · pith_short_12: OQ5CPWOK4GBK · pith_short_16: OQ5CPWOK4GBKFVCG · pith_short_8: OQ5CPWOK

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/OQ5CPWOK4GBKFVCGKPOXXOXUPH \
  | 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: 743a27d9cae182a2d44653dd7bbaf479e34413169dd706c6f5f196810e8f4fbf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "50292b009d08a9779fa0cd5d9828e7622a50dbd6a1de0d18ec9fd9382bc8dd9a",
    "cross_cats_sorted": [
      "math.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2015-04-14T08:54:48Z",
    "title_canon_sha256": "72525355fd921817f712fca1082d52712619605b6c7f32cae1721f8c109dc382"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.03457",
    "kind": "arxiv",
    "version": 1
  }
}