Pith Number

pith:IC3RJRNA

pith:2026:IC3RJRNA74QOCKDGS2D5WH2TEN

not attested not anchored not stored refs pending

Beyond Flat Labels: Level-Restricted Contrastive Learning for Hierarchical Fine-Grained Vision Classification

Elizabeth G Campolongo, Hilmar Lapp, Jianyang Gu, Matthew J Thompson, Nathan Jacobs, Net Zhang, Srikumar Sastry, Tanya Berger-Wolf, Wei-Lun Chao, Yu Su, Zhiyuan Tao, Ziheng Zhang

arxiv:2606.21838 v1 · 2026-06-20 · cs.CV · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IC3RJRNA74QOCKDGS2D5WH2TEN}

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	2026-06-23T02:13:00.475635Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

40b714c5a0ff20e128669687db1f5323491649684519d61e0bcbabc5da16c6bd

Aliases

arxiv: 2606.21838 · arxiv_version: 2606.21838v1 · doi: 10.48550/arxiv.2606.21838 · pith_short_12: IC3RJRNA74QO · pith_short_16: IC3RJRNA74QOCKDG · pith_short_8: IC3RJRNA

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/IC3RJRNA74QOCKDGS2D5WH2TEN \
  | 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: 40b714c5a0ff20e128669687db1f5323491649684519d61e0bcbabc5da16c6bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "308883681370b79de0268eef658fbb0524db6f7a9bee89edb8eb9319ea2d5d07",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-06-20T02:12:05Z",
    "title_canon_sha256": "a7b2b626183a685785b32ab082425aa71131e3c96edd53be874f18b6309947ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.21838",
    "kind": "arxiv",
    "version": 1
  }
}