Pith Number

pith:BT7E2KKU

pith:2026:BT7E2KKUIDQSKHXN2Z3FUZT3YU

not attested not anchored not stored refs pending

FairTutor: Equity-Aware Pedagogical LLM Routing for Budget-Constrained AI Tutoring

Qingyang Xu

arxiv:2606.20713 v1 · 2026-06-16 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BT7E2KKUIDQSKHXN2Z3FUZT3YU}

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	2026-06-23T00:11:54.463270Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0cfe4d295440e1251eedd6765a667bc53a4d297968dfb505f68be36412e3e1f7

Aliases

arxiv: 2606.20713 · arxiv_version: 2606.20713v1 · doi: 10.48550/arxiv.2606.20713 · pith_short_12: BT7E2KKUIDQS · pith_short_16: BT7E2KKUIDQSKHXN · pith_short_8: BT7E2KKU

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/BT7E2KKUIDQSKHXN2Z3FUZT3YU \
  | 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: 0cfe4d295440e1251eedd6765a667bc53a4d297968dfb505f68be36412e3e1f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c860523932485bf7fdea63e82b13b9e4060ae5e84c4f7486f5b331eab6fbed0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-06-16T12:55:22Z",
    "title_canon_sha256": "cbf2ed45eb9dbb85e5287b736b826738739fe7992bddde2f61deb1ed461f7067"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.20713",
    "kind": "arxiv",
    "version": 1
  }
}