Pith Number

pith:GK5L3MH3

pith:2021:GK5L3MH3IV6J7ZE6KLHW4MBAWQ

not attested not anchored not stored refs pending

U2-Former: A Nested U-shaped Transformer for Image Restoration

Guangming Lu, Haobo Ji, Jinxing Li, Wenjie Pei, Xin Feng

arxiv:2112.02279 v2 · 2021-12-04 · 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{GK5L3MH3IV6J7ZE6KLHW4MBAWQ}

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	2026-07-05T03:39:04.720297Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32babdb0fb457c9fe49e52cf6e3020b4308369ddd0a08b8e8f38579a92ccfdb3

Aliases

arxiv: 2112.02279 · arxiv_version: 2112.02279v2 · doi: 10.48550/arxiv.2112.02279 · pith_short_12: GK5L3MH3IV6J · pith_short_16: GK5L3MH3IV6J7ZE6 · pith_short_8: GK5L3MH3

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/GK5L3MH3IV6J7ZE6KLHW4MBAWQ \
  | 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: 32babdb0fb457c9fe49e52cf6e3020b4308369ddd0a08b8e8f38579a92ccfdb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7e6818d54ce3174d79dcfd1b4ff3f3f9132c4f58d76feafb414ff398ca056355",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-12-04T08:37:04Z",
    "title_canon_sha256": "fb80970654907f3db42b14aa3a5d2deff36f6c906a1dee92dfd9be331f87e431"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.02279",
    "kind": "arxiv",
    "version": 2
  }
}