Pith Number

pith:ISRTTJHV

pith:2013:ISRTTJHVEWYN5DCIEA6U4VS5Z2

not attested not anchored not stored refs pending

Unsupervised Feature Learning for low-level Local Image Descriptors

Christian Osendorfer, Justin Bayer, Patrick van der Smagt, Sebastian Urban

arxiv:1301.2840 v4 · 2013-01-14 · cs.CV · cs.LG · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ISRTTJHVEWYN5DCIEA6U4VS5Z2}

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	2026-05-18T03:27:11.245644Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44a339a4f525b0de8c48203d4e565dce83a0a1fbfd8373d9149e36f45cd789a2

Aliases

arxiv: 1301.2840 · arxiv_version: 1301.2840v4 · doi: 10.48550/arxiv.1301.2840 · pith_short_12: ISRTTJHVEWYN · pith_short_16: ISRTTJHVEWYN5DCI · pith_short_8: ISRTTJHV

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/ISRTTJHVEWYN5DCIEA6U4VS5Z2 \
  | 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: 44a339a4f525b0de8c48203d4e565dce83a0a1fbfd8373d9149e36f45cd789a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e122acab776ba7e796e88775cd9131d5915f7e343c8c41ead05216624320b709",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2013-01-14T01:34:17Z",
    "title_canon_sha256": "07a89ec6903a8e04784cf7236162e3be96a931111555d21d38aa6405196c3c63"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.2840",
    "kind": "arxiv",
    "version": 4
  }
}