Pith Number

pith:JTQVC6KX

pith:2026:JTQVC6KX4Y46B3TCUXQFTGKOGS

not attested not anchored not stored refs pending

Tail-Shape Estimation in LLM Evaluation Is Fragile: A Protocol for Diagnosing False Positives

Luca Zhou

arxiv:2606.16511 v2 · 2026-06-15 · 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{JTQVC6KX4Y46B3TCUXQFTGKOGS}

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	2026-07-02T01:18:19.735227Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ce1517957e639e0ee62a5e059994e34abf55ece435ee6d187003ca05daccc22

Aliases

arxiv: 2606.16511 · arxiv_version: 2606.16511v2 · doi: 10.48550/arxiv.2606.16511 · pith_short_12: JTQVC6KX4Y46 · pith_short_16: JTQVC6KX4Y46B3TC · pith_short_8: JTQVC6KX

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/JTQVC6KX4Y46B3TCUXQFTGKOGS \
  | 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: 4ce1517957e639e0ee62a5e059994e34abf55ece435ee6d187003ca05daccc22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0ad4e4db5b481375a732ebeabd8ba3e44f0242a55aeebc1e3992db2b45610ce",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-06-15T10:13:54Z",
    "title_canon_sha256": "543dd1881874f90dfa158399dd9334dcaed2270cd093e6d1bceebc8a9c307a4f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.16511",
    "kind": "arxiv",
    "version": 2
  }
}