Pith Number

pith:4GIRW4G2

pith:2019:4GIRW4G2WGEYCUKM53VZYJW45M

not attested not anchored not stored refs pending

Robot Calligraphy using Pseudospectral Optimal Control in Conjunction with a Novel Dynamic Brush Model

Frank Dellaert, Jiaqi Chen, Sen Wang, Seth Hutchinson, Xuanliang Deng

arxiv:1911.08002 v2 · 2019-11-18 · cs.RO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4GIRW4G2WGEYCUKM53VZYJW45M}

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	2026-07-05T01:36:49.160654Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1911b70dab18981514ceeeb9c26dceb284e62f9bd0b9652d6c19064f89f8476

Aliases

arxiv: 1911.08002 · arxiv_version: 1911.08002v2 · doi: 10.48550/arxiv.1911.08002 · pith_short_12: 4GIRW4G2WGEY · pith_short_16: 4GIRW4G2WGEYCUKM · pith_short_8: 4GIRW4G2

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/4GIRW4G2WGEYCUKM53VZYJW45M \
  | 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: e1911b70dab18981514ceeeb9c26dceb284e62f9bd0b9652d6c19064f89f8476

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7fa9d7a2e8ea225eae7322e9d27b6d25873d61eb43deeab0dfa74897247199c4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.RO",
    "submitted_at": "2019-11-18T23:34:31Z",
    "title_canon_sha256": "eefd698637b6251f88f86578c659179dfc6c55b9e84e1d8516e3f83640c374eb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.08002",
    "kind": "arxiv",
    "version": 2
  }
}