Pith Number

pith:2PHUOCWJ

pith:2019:2PHUOCWJDPLS7KE7ZFQKJSTIN5

not attested not anchored not stored refs pending

Empirical Hypothesis Space Reduction

Akihiro Yabe, Takanori Maehara

arxiv:1909.01576 v1 · 2019-09-04 · 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{2PHUOCWJDPLS7KE7ZFQKJSTIN5}

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	2026-07-05T00:02:17.637946Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3cf470ac91bd72fa89fc960a4ca686f4c25047e7bec0aa0e05ee00c51092d6a

Aliases

arxiv: 1909.01576 · arxiv_version: 1909.01576v1 · doi: 10.48550/arxiv.1909.01576 · pith_short_12: 2PHUOCWJDPLS · pith_short_16: 2PHUOCWJDPLS7KE7 · pith_short_8: 2PHUOCWJ

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/2PHUOCWJDPLS7KE7ZFQKJSTIN5 \
  | 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: d3cf470ac91bd72fa89fc960a4ca686f4c25047e7bec0aa0e05ee00c51092d6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd26d45eb8d1e1f37fdf03c1538714bcb1b189efe6b98dfa10dfc325abd01093",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-09-04T07:00:26Z",
    "title_canon_sha256": "7b61f606a21b889a014462afa957a0425a6c074102e8f8968848df73210e8f6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.01576",
    "kind": "arxiv",
    "version": 1
  }
}