Pith Number

pith:R5LA4DHR

pith:2018:R5LA4DHRS4PGZHL3GBFINURWG4

not attested not anchored not stored refs pending

Predicting CEFRL levels in learner English on the basis of metrics and full texts

Nicolas Ballier, Paula Liss\`on, Taylor Arnold, Thomas Gaillat

arxiv:1806.11099 v1 · 2018-06-28 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R5LA4DHRS4PGZHL3GBFINURWG4}

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	2026-05-18T00:12:07.037592Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f560e0cf1971e6c9d7b304a86d236370c64791f27a52ed984f6dff9fe8058c9

Aliases

arxiv: 1806.11099 · arxiv_version: 1806.11099v1 · doi: 10.48550/arxiv.1806.11099 · pith_short_12: R5LA4DHRS4PG · pith_short_16: R5LA4DHRS4PGZHL3 · pith_short_8: R5LA4DHR

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/R5LA4DHRS4PGZHL3GBFINURWG4 \
  | 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: 8f560e0cf1971e6c9d7b304a86d236370c64791f27a52ed984f6dff9fe8058c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a4950733ea3f1b23f86ce0b1a7617f2c8c34bb42dfb515d902d46cb74f16741",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2018-06-28T17:42:54Z",
    "title_canon_sha256": "fabeba267add983897e89a4b6045d2d399c2bfab8c45612955ad19398502aa13"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.11099",
    "kind": "arxiv",
    "version": 1
  }
}