Pith Number

pith:NSHYNVDV

pith:2025:NSHYNVDV4PST6WF32MRCLVBTTQ

not attested not anchored not stored refs pending

MAB Optimizer for Estimating Math Question Difficulty via Inverse CV without NLP

Aleksei Eliseev, Gourav Roy, Ram Kumar Rajendran, Surajit Das

arxiv:2508.19014 v2 · 2025-08-26 · 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{NSHYNVDV4PST6WF32MRCLVBTTQ}

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	2026-07-05T12:02:07.085657Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c8f86d475e3e53f58bbd32225d4339c307033615fb3f276b9ee77effd6bf49e

Aliases

arxiv: 2508.19014 · arxiv_version: 2508.19014v2 · doi: 10.48550/arxiv.2508.19014 · pith_short_12: NSHYNVDV4PST · pith_short_16: NSHYNVDV4PST6WF3 · pith_short_8: NSHYNVDV

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/NSHYNVDV4PST6WF32MRCLVBTTQ \
  | 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: 6c8f86d475e3e53f58bbd32225d4339c307033615fb3f276b9ee77effd6bf49e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d025573123649a69cbc8e10e7de7c18566f825e8893de4fbf96f843fd15d76ce",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2025-08-26T13:23:31Z",
    "title_canon_sha256": "c0dd096bfd2027df920fba4f904beb051465a89dde5725e6327dd2ef65b40a5b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.19014",
    "kind": "arxiv",
    "version": 2
  }
}