Pith Number

pith:UPIJ23SS

pith:2020:UPIJ23SS7IEULGPC6HIYQWI7PQ

not attested not anchored not stored refs pending

Real-time Image Smoothing via Iterative Least Squares

Chunhua Shen, Ian Reid, Jie Yang, Pingping Zhang, Wei Liu, Xiaolin Huang

arxiv:2003.07504 v2 · 2020-03-17 · cs.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UPIJ23SS7IEULGPC6HIYQWI7PQ}

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	2026-07-05T01:03:23.876454Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3d09d6e52fa094599e2f1d188591f7c0b6b3d330b0fc424614ea05ceb0ce324

Aliases

arxiv: 2003.07504 · arxiv_version: 2003.07504v2 · doi: 10.48550/arxiv.2003.07504 · pith_short_12: UPIJ23SS7IEU · pith_short_16: UPIJ23SS7IEULGPC · pith_short_8: UPIJ23SS

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/UPIJ23SS7IEULGPC6HIYQWI7PQ \
  | 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: a3d09d6e52fa094599e2f1d188591f7c0b6b3d330b0fc424614ea05ceb0ce324

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0cb856e5241b63fff5f04b88a742a8eff5740d143eb023f10b3948adcbf37844",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.GR",
    "submitted_at": "2020-03-17T02:49:32Z",
    "title_canon_sha256": "991ef105dc73171ef7b05a56cf858b7954de846fbb813465e19a5d563c7a03b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.07504",
    "kind": "arxiv",
    "version": 2
  }
}