Pith Number

pith:FQGVTZLF

pith:2015:FQGVTZLFIYWP6ULDOJS7OJZKXW

not attested not anchored not stored refs pending

Mathematical Language Processing: Automatic Grading and Feedback for Open Response Mathematical Questions

Andrew E. Waters, Andrew S. Lan, Divyanshu Vats, Richard G. Baraniuk

arxiv:1501.04346 v1 · 2015-01-18 · stat.ML · cs.AI · cs.CL · 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{FQGVTZLFIYWP6ULDOJS7OJZKXW}

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	2026-05-18T02:29:09.292565Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c0d59e565462cff51637265f7272abd98d30d61e71e80382470c9d08e8e2489

Aliases

arxiv: 1501.04346 · arxiv_version: 1501.04346v1 · doi: 10.48550/arxiv.1501.04346 · pith_short_12: FQGVTZLFIYWP · pith_short_16: FQGVTZLFIYWP6ULD · pith_short_8: FQGVTZLF

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/FQGVTZLFIYWP6ULDOJS7OJZKXW \
  | 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: 2c0d59e565462cff51637265f7272abd98d30d61e71e80382470c9d08e8e2489

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ebf830e61429c581b14a9112c92430d5a80587e9700f71814c68804fa26b5a73",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.CL",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2015-01-18T20:50:39Z",
    "title_canon_sha256": "c7d2a92c9ccdccfcd99ca19123294d047593aadddbd51694432822c6f56f1bdd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.04346",
    "kind": "arxiv",
    "version": 1
  }
}