Pith Number

pith:USOPY4UB

pith:2021:USOPY4UBCC3M5HJKISI5XEE3UT

not attested not anchored not stored refs pending

All-Optical Image Identification with Programmable Matrix Transformation

Baohua Ni, Fang Liu, Kaiyu Cui, Shikang Li, Wei Zhang, Xue Feng, Yidong Huang

arxiv:2104.02474 v1 · 2021-04-01 · physics.optics · eess.IV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{USOPY4UBCC3M5HJKISI5XEE3UT}

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	2026-07-05T03:07:06.005670Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a49cfc728110b6ce9d2a4491db909ba4e432987168a6c20047dfc9629ca0757f

Aliases

arxiv: 2104.02474 · arxiv_version: 2104.02474v1 · doi: 10.48550/arxiv.2104.02474 · pith_short_12: USOPY4UBCC3M · pith_short_16: USOPY4UBCC3M5HJK · pith_short_8: USOPY4UB

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/USOPY4UBCC3M5HJKISI5XEE3UT \
  | 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: a49cfc728110b6ce9d2a4491db909ba4e432987168a6c20047dfc9629ca0757f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f81a2b81cf57b0cddfa62fcfde43c617a41bcb632966ff0056be607eebf9cb6",
    "cross_cats_sorted": [
      "eess.IV"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2021-04-01T03:07:32Z",
    "title_canon_sha256": "bcc3493a2f00792ede3f0b74707af68826d215e09d018d02b407113f444b96b9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.02474",
    "kind": "arxiv",
    "version": 1
  }
}