Pith Number

pith:KSAE6GYL

pith:2020:KSAE6GYL57OGEV2VKTXCWTS747

not attested not anchored not stored refs pending

Self-supervised Pre-training with Hard Examples Improves Visual Representations

Baolin Peng, Chunyuan Li, Jianfeng Gao, Lei Zhang, Mingyuan Zhou, Xiujun Li

arxiv:2012.13493 v2 · 2020-12-25 · cs.CV · cs.AI · 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{KSAE6GYL57OGEV2VKTXCWTS747}

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	2026-07-05T02:04:14.404559Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54804f1b0befdc62575554ee2b4e5fe7f0e791e1e8b4101e7bd59b9041858ed2

Aliases

arxiv: 2012.13493 · arxiv_version: 2012.13493v2 · doi: 10.48550/arxiv.2012.13493 · pith_short_12: KSAE6GYL57OG · pith_short_16: KSAE6GYL57OGEV2V · pith_short_8: KSAE6GYL

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/KSAE6GYL57OGEV2VKTXCWTS747 \
  | 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: 54804f1b0befdc62575554ee2b4e5fe7f0e791e1e8b4101e7bd59b9041858ed2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5524a5ffdc7e69e73f46c288a2d106afd56b97f8b556dfef5f27a8f5f8b45fb5",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2020-12-25T02:44:22Z",
    "title_canon_sha256": "4e9de7595856fe3c36a6e8df29656e04f9fdf96c3e0ecfec8f2c5269e1be2ec0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.13493",
    "kind": "arxiv",
    "version": 2
  }
}