Pith Number

pith:72A7LXDT

pith:2025:72A7LXDTYO2NXNL7G3FFTNPI2R

not attested not anchored not stored refs pending

Position: Stop Chasing the C-index when Evaluating Survival Analysis Models

Christian Fischer Pedersen, Christian Marius Lillelund, Russell Greiner, Shi-ang Qi

arxiv:2506.02075 v2 · 2025-06-02 · stat.ME · 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{72A7LXDTYO2NXNL7G3FFTNPI2R}

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	2026-05-29T02:05:34.992805Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fe81f5dc73c3b4dbb57f36ca59b5e8d47e7c615b1e0fa5fc2d75e55793ceb76c

Aliases

arxiv: 2506.02075 · arxiv_version: 2506.02075v2 · doi: 10.48550/arxiv.2506.02075 · pith_short_12: 72A7LXDTYO2N · pith_short_16: 72A7LXDTYO2NXNL7 · pith_short_8: 72A7LXDT

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/72A7LXDTYO2NXNL7G3FFTNPI2R \
  | 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: fe81f5dc73c3b4dbb57f36ca59b5e8d47e7c615b1e0fa5fc2d75e55793ceb76c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0de00889feefaf972931e044321116118fa7ef196ffebd65e30d2b0cbf7fd13d",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2025-06-02T07:59:34Z",
    "title_canon_sha256": "a66e9f47cbc7be18379039c320a9dcadf9204208e2b4fa8bef583135c5b8e38f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2506.02075",
    "kind": "arxiv",
    "version": 2
  }
}