Pith Number

pith:MT4WWRNC

pith:2019:MT4WWRNCP5VZMFZIB7KTDLFPUM

not attested not anchored not stored refs pending

On the integrability of Hill's equation of the motion of the moon

Bruno Sc\'ardua, Fernando Reis

arxiv:1902.02927 v1 · 2019-02-08 · 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{MT4WWRNCP5VZMFZIB7KTDLFPUM}

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	2026-05-17T23:54:28.819409Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64f96b45a27f6b9617280fd531acafa33f378a2cae1b87ec964604fcaca41ab7

Aliases

arxiv: 1902.02927 · arxiv_version: 1902.02927v1 · doi: 10.48550/arxiv.1902.02927 · pith_short_12: MT4WWRNCP5VZ · pith_short_16: MT4WWRNCP5VZMFZI · pith_short_8: MT4WWRNC

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/MT4WWRNCP5VZMFZIB7KTDLFPUM \
  | 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: 64f96b45a27f6b9617280fd531acafa33f378a2cae1b87ec964604fcaca41ab7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e591d48ae17516582b1d6ecb87c3a2d629d6f86ce20c1a11aee40722e78889e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2019-02-08T03:30:23Z",
    "title_canon_sha256": "bdd53c04b1f08c66c11cdf6c5a16351b4e2fd8c4501e81404e13c3d872794511"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.02927",
    "kind": "arxiv",
    "version": 1
  }
}