Pith Number

pith:LSFHGKTS

pith:2026:LSFHGKTSHZ7YBMRABICKQNVCA6

not attested not anchored not stored refs pending

Estimating Learners' Skill Acquisition Without Temporal Information

Hisashi Kashima, Jill-J\^enn Vie (SODA), Koh Takeuchi, Kyohei Atarashi, Ryosuke Nagai

arxiv:2606.20611 v1 · 2026-05-22 · cs.CY · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LSFHGKTSHZ7YBMRABICKQNVCA6}

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	2026-06-23T00:11:51.375570Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c8a732a723e7f80b2200a04a836a207a27ebd432dc471c54fcaecfffb977790

Aliases

arxiv: 2606.20611 · arxiv_version: 2606.20611v1 · doi: 10.48550/arxiv.2606.20611 · pith_short_12: LSFHGKTSHZ7Y · pith_short_16: LSFHGKTSHZ7YBMRA · pith_short_8: LSFHGKTS

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/LSFHGKTSHZ7YBMRABICKQNVCA6 \
  | 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: 5c8a732a723e7f80b2200a04a836a207a27ebd432dc471c54fcaecfffb977790

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6e914d1347bd8596eb246fedd070c96490e3b1c4e8d09d240a9825bebd71ec89",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2026-05-22T13:53:41Z",
    "title_canon_sha256": "45a8da8a073aae77b406c59c119b0da87e6cc70940133af780c78a1dea75e25a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.20611",
    "kind": "arxiv",
    "version": 1
  }
}