Pith Number

pith:B4W64KTN

pith:2025:B4W64KTN53QMY2GBRVTXXJSCBF

not attested not anchored not stored refs pending

No LLM Solved Yu Tsumura's 554th Problem

Simon Frieder, William Hart

arxiv:2508.03685 v1 · 2025-08-05 · 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{B4W64KTN53QMY2GBRVTXXJSCBF}

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	2026-07-05T11:49:01.150798Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f2dee2a6deee0cc68c18d677ba642097c60165f46bf3f2c252b98b4912ff786

Aliases

arxiv: 2508.03685 · arxiv_version: 2508.03685v1 · doi: 10.48550/arxiv.2508.03685 · pith_short_12: B4W64KTN53QM · pith_short_16: B4W64KTN53QMY2GB · pith_short_8: B4W64KTN

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/B4W64KTN53QMY2GBRVTXXJSCBF \
  | 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: 0f2dee2a6deee0cc68c18d677ba642097c60165f46bf3f2c252b98b4912ff786

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52d60c669614c758d7ab14568c29211d0309a1a3426629400bb711cafd940bd5",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-08-05T17:55:20Z",
    "title_canon_sha256": "9b781e5d08dbc751ff0f3b31f318f21009d84580bb2701269618b81c4919a7ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.03685",
    "kind": "arxiv",
    "version": 1
  }
}