Pith Number

pith:4RYQMNZ4

pith:2026:4RYQMNZ4SRBRILVCBAMASVQDBB

not attested not anchored not stored refs pending

A Comparative Study of Feature Selection Methods for EHR Diagnosis Codes in Opioid Use Disorder Prediction

Benjamin Littenberg, Fusheng Wang, George Leibowitz, Rachel Wong, Richard N. Rosenthal, Tengfei Ma, Xia Zheng, Yinan Liu, Zihan Ding

arxiv:2608.04180 v1 · 2026-08-04 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4RYQMNZ4SRBRILVCBAMASVQDBB}

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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	2026-08-06T01:30:55.108657Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e47106373c9443142ea20818095603084ff3c4d1c8ef6da49134b9eb695f9ffd

Aliases

arxiv: 2608.04180 · arxiv_version: 2608.04180v1 · doi: 10.48550/arxiv.2608.04180 · pith_short_12: 4RYQMNZ4SRBR · pith_short_16: 4RYQMNZ4SRBRILVC · pith_short_8: 4RYQMNZ4

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/4RYQMNZ4SRBRILVCBAMASVQDBB \
  | 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: e47106373c9443142ea20818095603084ff3c4d1c8ef6da49134b9eb695f9ffd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "329fc1e373af2bbd922e474c9d52d0437674636a94547fe544c72733621cc897",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-08-04T19:37:29Z",
    "title_canon_sha256": "0f0bf139e21717e0221a6d19e167d885fe4d2dda35ee2eea6ba5a06be6af1b4e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2608.04180",
    "kind": "arxiv",
    "version": 1
  }
}