Pith Number

pith:LDAN7TGK

pith:2017:LDAN7TGKR3WAL5KRWNMB7AYM4S

not attested not anchored not stored refs pending

On topological obstructions to global stabilization of an inverted pendulum

Ivan Polekhin

arxiv:1704.03698 v2 · 2017-04-12 · math.OC · math.CA · physics.class-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LDAN7TGKR3WAL5KRWNMB7AYM4S}

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	2026-05-18T00:34:22.717860Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

58c0dfccca8eec05f551b3581f830ce484f3a2d4106c1bad114e20d08d150e24

Aliases

arxiv: 1704.03698 · arxiv_version: 1704.03698v2 · doi: 10.48550/arxiv.1704.03698 · pith_short_12: LDAN7TGKR3WA · pith_short_16: LDAN7TGKR3WAL5KR · pith_short_8: LDAN7TGK

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/LDAN7TGKR3WAL5KRWNMB7AYM4S \
  | 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: 58c0dfccca8eec05f551b3581f830ce484f3a2d4106c1bad114e20d08d150e24

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "58e5a89437c2f4c5ddde0643802791ca44acac2bc81954ffa8d9a902429f4557",
    "cross_cats_sorted": [
      "math.CA",
      "physics.class-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-04-12T11:04:02Z",
    "title_canon_sha256": "06d11498f5008cfacc7ee71fa10c52c2083701d49d143a220958e38f4385679e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.03698",
    "kind": "arxiv",
    "version": 2
  }
}