Pith Number

pith:TWTDRJNY

pith:2026:TWTDRJNYXMXJLV2X5PN3SVT2YV

not attested not anchored not stored refs pending

When Knowledge Changes: Metamorphic Testing of RAG Systems with Mutations

Jinhan Kim, Paolo Tonella, Samuele Pasini

arxiv:2607.26843 v1 · 2026-07-29 · cs.SE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TWTDRJNYXMXJLV2X5PN3SVT2YV}

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	2026-07-30T01:22:30.626090Z
Builder	pith-number-builder-2026-05-17-v1
Signature	unsigned_v0
Schema	pith-number/v1.0

Canonical hash

9da638a5b8bb2e95d757ebdbb9567ac5585427764fdd7719529db003681431c0

Aliases

arxiv: 2607.26843 · arxiv_version: 2607.26843v1 · doi: 10.48550/arxiv.2607.26843 · pith_short_12: TWTDRJNYXMXJ · pith_short_16: TWTDRJNYXMXJLV2X · pith_short_8: TWTDRJNY

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/TWTDRJNYXMXJLV2X5PN3SVT2YV \
  | 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: 9da638a5b8bb2e95d757ebdbb9567ac5585427764fdd7719529db003681431c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d36afda51ead7436b801b65495956ac45f255b186ccf0d3ce6bd35d884f3d513",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2026-07-29T12:32:04Z",
    "title_canon_sha256": "0bc246682383dc1c79916411db2e52c5421203420531c5e5cfc7d2486041f4ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.26843",
    "kind": "arxiv",
    "version": 1
  }
}