Pith Number

pith:5MNRZARS

pith:2026:5MNRZARSLP6MJL7V45D4MTRWVX

not attested not anchored not stored refs pending

The Coverage Illusion: From Pre-retrieval Routing Failure to Post-retrieval Cascades in a Production RAG System

Kristoffer Nielbo, Zafar Hussain

arxiv:2605.27220 v1 · 2026-05-26 · cs.CL · cs.IR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5MNRZARSLP6MJL7V45D4MTRWVX}

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	2026-05-27T02:05:48.773028Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eb1b1c82325bfcc4aff5e747c64e36adfbff4f2b97aecf12be229b609fb78ad2

Aliases

arxiv: 2605.27220 · arxiv_version: 2605.27220v1 · doi: 10.48550/arxiv.2605.27220 · pith_short_12: 5MNRZARSLP6M · pith_short_16: 5MNRZARSLP6MJL7V · pith_short_8: 5MNRZARS

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/5MNRZARSLP6MJL7V45D4MTRWVX \
  | 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: eb1b1c82325bfcc4aff5e747c64e36adfbff4f2b97aecf12be229b609fb78ad2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a3c9263cfd1803d03b4a1ba13ca0ca0943072ca2c6b596d5bdb8eeca856e705",
    "cross_cats_sorted": [
      "cs.IR"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-05-26T16:08:34Z",
    "title_canon_sha256": "84b59d2ef6e264abc6cbd97a82a12c2dcacb317c84ec98e457d78b96451d2759"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.27220",
    "kind": "arxiv",
    "version": 1
  }
}