Pith Number

pith:WPTPGC6F

pith:2026:WPTPGC6FT5WM7M3FNLAAMEMZTP

not attested not anchored not stored refs pending

The C-index illusion: discrimination without calibration in published survival models

Danilo Alvares, Rafael da Silva

arxiv:2607.19526 v1 · 2026-07-21 · 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{WPTPGC6FT5WM7M3FNLAAMEMZTP}

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	2026-07-23T00:23:55.156066Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3e6f30bc59f6ccfb3656ac00611999bcd1b38668e0be1edd0add24706a89531

Aliases

arxiv: 2607.19526 · arxiv_version: 2607.19526v1 · doi: 10.48550/arxiv.2607.19526 · pith_short_12: WPTPGC6FT5WM · pith_short_16: WPTPGC6FT5WM7M3F · pith_short_8: WPTPGC6F

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/WPTPGC6FT5WM7M3FNLAAMEMZTP \
  | 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: b3e6f30bc59f6ccfb3656ac00611999bcd1b38668e0be1edd0add24706a89531

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4033264ee78a802b82ce3f046980b1c663704631536043685c53aca916ac7c82",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-07-21T19:13:54Z",
    "title_canon_sha256": "2fbf3718111d9537ae530293c239836016725648aa145b809ebb05b3a2f9b6b5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.19526",
    "kind": "arxiv",
    "version": 1
  }
}