Pith Number

pith:QOPIE5KB

pith:2021:QOPIE5KB44PG2KSHZ6XHEQ77RC

not attested not anchored not stored refs pending

An Improved Discriminative Optimization for 3D Rigid Point Cloud Registration

Biao Li, Jia Wang, Junzheng Wu, Ping Wang, Ruigang Fu

arxiv:2104.08854 v1 · 2021-04-18 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QOPIE5KB44PG2KSHZ6XHEQ77RC}

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	2026-07-05T02:32:56.214910Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

839e827541e71e6d2a47cfae7243ff88a72003a57bbffa6d6988f3512fd1b4d3

Aliases

arxiv: 2104.08854 · arxiv_version: 2104.08854v1 · doi: 10.48550/arxiv.2104.08854 · pith_short_12: QOPIE5KB44PG · pith_short_16: QOPIE5KB44PG2KSH · pith_short_8: QOPIE5KB

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/QOPIE5KB44PG2KSHZ6XHEQ77RC \
  | 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: 839e827541e71e6d2a47cfae7243ff88a72003a57bbffa6d6988f3512fd1b4d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d46394d403b3d1acd34fdb9c2dd863ab117ce4a6e4c5fb6b8ce140385734a26e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-04-18T13:39:52Z",
    "title_canon_sha256": "68d61e843d41065948cacdde48c0d2d1c02492f6c3148c680c8e8f1d5b170e07"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.08854",
    "kind": "arxiv",
    "version": 1
  }
}