Pith Number

pith:W6HX2J6F

pith:2019:W6HX2J6FQ7GIEVKI3BOSWUTWGU

not attested not anchored not stored refs pending

Cold Case: The Lost MNIST Digits

Chhavi Yadav, L\'eon Bottou

arxiv:1905.10498 v2 · 2019-05-25 · cs.LG · cs.CV · 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{W6HX2J6FQ7GIEVKI3BOSWUTWGU}

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.

Cited by

1 paper in Pith

That which we call private

Receipt and verification

First computed	2026-07-05T00:16:49.548712Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b78f7d27c587cc825548d85d2b5276351f67957588ba0a604715cb3e47e72c88

Aliases

arxiv: 1905.10498 · arxiv_version: 1905.10498v2 · doi: 10.48550/arxiv.1905.10498 · pith_short_12: W6HX2J6FQ7GI · pith_short_16: W6HX2J6FQ7GIEVKI · pith_short_8: W6HX2J6F

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/W6HX2J6FQ7GIEVKI3BOSWUTWGU \
  | 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: b78f7d27c587cc825548d85d2b5276351f67957588ba0a604715cb3e47e72c88

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18f62ea5d47247ab037c449245fe794f92a1a60078c08f15c2461148d9abed1e",
    "cross_cats_sorted": [
      "cs.CV",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-05-25T01:50:51Z",
    "title_canon_sha256": "c3a9ee52ddf4a11f36526db6cfc9738724b486c0832e2cf5b8566d810ebaf915"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.10498",
    "kind": "arxiv",
    "version": 2
  }
}