Pith Number

pith:JFRKZ7PE

pith:2021:JFRKZ7PESIN4RXDUYU3OL3NHXU

not attested not anchored not stored refs pending

Evaluating Contrastive Models for Instance-based Image Retrieval

Kevin McGuinness, Noel O'Connor, Tarun Krishna

arxiv:2104.14939 v1 · 2021-04-30 · 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{JFRKZ7PESIN4RXDUYU3OL3NHXU}

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	2026-07-05T02:36:28.206989Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4962acfde4921bc8dc74c536e5eda7bd248b52a203c6f44a684cc4147644d9eb

Aliases

arxiv: 2104.14939 · arxiv_version: 2104.14939v1 · doi: 10.48550/arxiv.2104.14939 · pith_short_12: JFRKZ7PESIN4 · pith_short_16: JFRKZ7PESIN4RXDU · pith_short_8: JFRKZ7PE

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/JFRKZ7PESIN4RXDUYU3OL3NHXU \
  | 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: 4962acfde4921bc8dc74c536e5eda7bd248b52a203c6f44a684cc4147644d9eb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7acb06705eb2e5051d806b2b8e7371eda6ed3c6d24e5ec78bb962b9dab347b8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-04-30T12:05:23Z",
    "title_canon_sha256": "1ac8c399741f98805154267cbd37f7d516393696aa8fe77d57f7f11d8d97c69b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.14939",
    "kind": "arxiv",
    "version": 1
  }
}