Pith Number

pith:LP4NCQNI

pith:2025:LP4NCQNI4OXF4BWNP4JU2CQOPD

not attested not anchored not stored refs pending

Dynamic Feature Selection from Variable Feature Sets Using Features of Features

Hisashi Kashima, Katsumi Takahashi, Koh Takeuchi

arxiv:2503.09181 v1 · 2025-03-12 · cs.LG · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LP4NCQNI4OXF4BWNP4JU2CQOPD}

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	2026-07-05T10:29:50.875143Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5bf8d141a8e3ae5e06cd7f134d0a0e78c9bf4f737fb4eb1c24d75cd73de14938

Aliases

arxiv: 2503.09181 · arxiv_version: 2503.09181v1 · doi: 10.48550/arxiv.2503.09181 · pith_short_12: LP4NCQNI4OXF · pith_short_16: LP4NCQNI4OXF4BWN · pith_short_8: LP4NCQNI

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/LP4NCQNI4OXF4BWNP4JU2CQOPD \
  | 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: 5bf8d141a8e3ae5e06cd7f134d0a0e78c9bf4f737fb4eb1c24d75cd73de14938

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "59982d66fb257ed08f8c48d5152e15946677d756994c7febb10d57200521f14c",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-03-12T09:13:21Z",
    "title_canon_sha256": "0cf6f3aa4b570f962c5cad7b491293fcaa4c4ebcb0eb05fb918b1112a0922a3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2503.09181",
    "kind": "arxiv",
    "version": 1
  }
}