Pith Number

pith:KEYYN2FJ

pith:2026:KEYYN2FJEERJMQ7RXVMVF3ZP7M

not attested not anchored not stored refs pending

When More Data Doesn't Help: Limits of Adaptation in Multitask Learning

Mingyue Xu, Steve Hanneke

arxiv:2601.20774 v2 · 2026-01-28 · 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{KEYYN2FJEERJMQ7RXVMVF3ZP7M}

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	2026-06-01T01:02:30.582603Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

513186e8a921229643f1bd5952ef2ffb0894af39de1ce2284ee380603d3acdc9

Aliases

arxiv: 2601.20774 · arxiv_version: 2601.20774v2 · doi: 10.48550/arxiv.2601.20774 · pith_short_12: KEYYN2FJEERJ · pith_short_16: KEYYN2FJEERJMQ7R · pith_short_8: KEYYN2FJ

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/KEYYN2FJEERJMQ7RXVMVF3ZP7M \
  | 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: 513186e8a921229643f1bd5952ef2ffb0894af39de1ce2284ee380603d3acdc9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7fa3d09d2e489804d7eb82b960082ef686db8069443898a04f5c3cef6f4fd644",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-01-28T17:00:11Z",
    "title_canon_sha256": "e88ccde217ec06db5e7e5c702aad989c5eb41b74aa3a1e4858f60296a66dd2f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.20774",
    "kind": "arxiv",
    "version": 2
  }
}