Pith Number

pith:OSUS25D3

pith:2026:OSUS25D35MPOO7G3CPIDQ25E2C

not attested not anchored not stored refs pending

Utility-Preserving De-Identification for Math Tutoring: Investigating Numeric Ambiguity in the MathEd-PII Benchmark Dataset

Bakhtawar Ahtisham, Chris Shaw, Daryl Hedley, Doug Pietrzak, Jinsook Lee, Jorge Dias, Kirk Vanacore, Ren\'e F. Kizilcec, Ruth Sch\"afer, Zhuqian Zhou

Domain-aware LLM prompting detects PII in math tutoring dialogues while preserving instructional numbers.

arxiv:2602.16571 v3 · 2026-02-18 · cs.CL

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\pithnumber{OSUS25D35MPOO7G3CPIDQ25E2C}

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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.

Claims

C1strongest claim

Domain-aware prompting, including both math-aware (F1: 0.802) and segment-aware versions (F1: 0.821), substantially outperforms the baseline (F1: 0.379) while reducing numeric false positives.

C2weakest assumption

That the human-in-the-loop LLM annotation process produces reliable ground-truth PII labels that generalize to unseen math tutoring dialogues without introducing systematic bias toward certain numeric patterns.

C3one line summary

The MathEd-PII benchmark shows that math-aware and segment-aware LLM prompting raises PII detection F1 from 0.379 to 0.821 while cutting false redactions of instructional numbers.

Cited by

1 paper in Pith

Utility-Preserving De-Identification for Math Tutoring: Investigating Numeric Ambiguity in the MathEd-PII Benchmark Dataset

Receipt and verification

First computed	2026-06-02T02:04:14.795801Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74a92d747beb1ee77cdb13d0386ba4d0b4e523dcb904d65a58d98be81a3465f2

Aliases

arxiv: 2602.16571 · arxiv_version: 2602.16571v3 · doi: 10.48550/arxiv.2602.16571 · pith_short_12: OSUS25D35MPO · pith_short_16: OSUS25D35MPOO7G3 · pith_short_8: OSUS25D3

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/OSUS25D35MPOO7G3CPIDQ25E2C \
  | 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: 74a92d747beb1ee77cdb13d0386ba4d0b4e523dcb904d65a58d98be81a3465f2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1789351b98581a8fd5b9bdd3fdbde11a57766fd94073bc73af5fa509d59bff69",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-02-18T16:12:46Z",
    "title_canon_sha256": "6c0fe735db1ebb2c8021ea4d2e7bbfaad8716019d70f5cc649151981d095d7ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.16571",
    "kind": "arxiv",
    "version": 3
  }
}