Pith Number

pith:N72UVXGO

pith:2019:N72UVXGOIF4MJCLQEFPP5LI5DW

not attested not anchored not stored refs pending

Hierarchical method for cataract grading based on retinal images using improved Haar wavelet

Huiqi Li, Liang Xu, Li Zhang, Lvchen Cao, Yanjun Zhang

arxiv:1904.01261 v1 · 2019-04-02 · 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{N72UVXGOIF4MJCLQEFPP5LI5DW}

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	2026-05-17T23:49:35.384275Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ff54adcce4178c48970215efead1d1d95520e789aa8c83c8981d48a03bbb84d

Aliases

arxiv: 1904.01261 · arxiv_version: 1904.01261v1 · doi: 10.48550/arxiv.1904.01261 · pith_short_12: N72UVXGOIF4M · pith_short_16: N72UVXGOIF4MJCLQ · pith_short_8: N72UVXGO

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/N72UVXGOIF4MJCLQEFPP5LI5DW \
  | 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: 6ff54adcce4178c48970215efead1d1d95520e789aa8c83c8981d48a03bbb84d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c607927b141c1f43d875716678bf600c4f0e32687958c7c1d1a0191a9ceac6e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-04-02T07:47:53Z",
    "title_canon_sha256": "e17989789b4743a1baf843af7c7e5fd56e9db17fa427d00ee17de3fcf25dc1ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.01261",
    "kind": "arxiv",
    "version": 1
  }
}