Pith Number

pith:2N5KCEZT

pith:2026:2N5KCEZT2MOFZ6DFOQE4ZMVKSK

not attested not anchored not stored refs pending

How Hard Can It Be? Hardness-Aware Multi-Objective Unlearning

Bryan Kian Hsiang Low, Jiangwei Chen, Nancy F. Chen, Rachael Hwee Ling Sim, Xinyuan Niu, Zhengyuan Liu

arxiv:2606.02119 v1 · 2026-06-01 · cs.LG · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2N5KCEZT2MOFZ6DFOQE4ZMVKSK}

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	2026-06-02T02:05:06.939722Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d37aa11333d31c5cf8657409ccb2aa929889ebeec9c22836dbecec7bb9403b6b

Aliases

arxiv: 2606.02119 · arxiv_version: 2606.02119v1 · doi: 10.48550/arxiv.2606.02119 · pith_short_12: 2N5KCEZT2MOF · pith_short_16: 2N5KCEZT2MOFZ6DF · pith_short_8: 2N5KCEZT

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/2N5KCEZT2MOFZ6DFOQE4ZMVKSK \
  | 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: d37aa11333d31c5cf8657409ccb2aa929889ebeec9c22836dbecec7bb9403b6b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aec8d1341d17ad827f1c562696aa6e9a0e06f0596ec90eb01ac7f61849f25398",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-06-01T11:49:47Z",
    "title_canon_sha256": "8e1441383a3ce57b4f415ab2888635d19e7a8b13afc760101028b1aa8f417c5a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.02119",
    "kind": "arxiv",
    "version": 1
  }
}