Pith Number

pith:HNNFB4TS

pith:2020:HNNFB4TSN27U3AWHPW4UWMNE2V

not attested not anchored not stored refs pending

Clustering based Contrastive Learning for Improving Face Representations

Makarand Tapaswi, M. Saquib Sarfraz, Rainer Stiefelhagen, Vivek Sharma

arxiv:2004.02195 v1 · 2020-04-05 · 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{HNNFB4TSN27U3AWHPW4UWMNE2V}

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	2026-07-05T00:52:56.802213Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3b5a50f2726ebf4d82c77db94b31a4d55e3b0c0466f6a1fe2635dd435d52da24

Aliases

arxiv: 2004.02195 · arxiv_version: 2004.02195v1 · doi: 10.48550/arxiv.2004.02195 · pith_short_12: HNNFB4TSN27U · pith_short_16: HNNFB4TSN27U3AWH · pith_short_8: HNNFB4TS

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/HNNFB4TSN27U3AWHPW4UWMNE2V \
  | 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: 3b5a50f2726ebf4d82c77db94b31a4d55e3b0c0466f6a1fe2635dd435d52da24

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "402cd2611746002c72d9ab522b5e5f436e183f4660ba4574ef442c280c153bda",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2020-04-05T13:11:44Z",
    "title_canon_sha256": "f14487870b771a33e5820f42502dcf084294938299198a18822632493d062835"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.02195",
    "kind": "arxiv",
    "version": 1
  }
}