Pith Number

pith:HLE625A5

pith:2018:HLE625A5NBDRFH623HGUMOXNOB

not attested not anchored not stored refs pending

An Adaptive Observer for Sensorless Control of the Levitated Ball Using Signal Injection

Bowen Yi, Houria Siguerdidjane, Romeo Ortega, Weidong Zhang

arxiv:1804.02697 v2 · 2018-04-08 · cs.SY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HLE625A5NBDRFH623HGUMOXNOB}

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	2026-05-18T00:09:47.122460Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ac9ed741d6847129fdad9cd463aed705d5cfe1902d0b707ff8e106276e74d87

Aliases

arxiv: 1804.02697 · arxiv_version: 1804.02697v2 · doi: 10.48550/arxiv.1804.02697 · pith_short_12: HLE625A5NBDR · pith_short_16: HLE625A5NBDRFH62 · pith_short_8: HLE625A5

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/HLE625A5NBDRFH623HGUMOXNOB \
  | 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: 3ac9ed741d6847129fdad9cd463aed705d5cfe1902d0b707ff8e106276e74d87

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "612806064cd0b762bc20c0cf4b5b3c597f88bfe078a4b0595b1c967738d34667",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2018-04-08T14:37:19Z",
    "title_canon_sha256": "313616ad7b9eab4a36e024093528322f52aea7b297550b91a370029095a27c2c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.02697",
    "kind": "arxiv",
    "version": 2
  }
}