Pith Number

pith:FABQDT7X

pith:2013:FABQDT7X5J6AZRM7TXUKXIAALW

not attested not anchored not stored refs pending

Trouble With The Curve: Improving MLB Pitch Classification

A.C. Thomas, Michael A. Pane, Rebecca C. Steorts, Samuel L. Ventura

arxiv:1304.1756 v1 · 2013-04-05 · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FABQDT7X5J6AZRM7TXUKXIAALW}

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	2026-05-18T03:28:54.777635Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

280301cff7ea7c0cc59f9de8aba0005da829bd91aceae4689aae51532b89e4c0

Aliases

arxiv: 1304.1756 · arxiv_version: 1304.1756v1 · doi: 10.48550/arxiv.1304.1756 · pith_short_12: FABQDT7X5J6A · pith_short_16: FABQDT7X5J6AZRM7 · pith_short_8: FABQDT7X

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/FABQDT7X5J6AZRM7TXUKXIAALW \
  | 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: 280301cff7ea7c0cc59f9de8aba0005da829bd91aceae4689aae51532b89e4c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f99075aa23e266414ae1d036e158ee82119cc041abdf80a4742e44c558498c9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2013-04-05T16:27:49Z",
    "title_canon_sha256": "01c76f4bd193a43a27d166c1b211f77c5e25fa416cd7b6138350dc0a56ae605d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.1756",
    "kind": "arxiv",
    "version": 1
  }
}