Pith Number

pith:5MCMCHPM

pith:2015:5MCMCHPMRZCNPCM67J4KMMFPSS

not attested not anchored not stored refs pending

Learning Structural Kernels for Natural Language Processing

Christian Hardmeier, Daniel Beck, Lucia Specia, Trevor Cohn

arxiv:1508.02131 v1 · 2015-08-10 · 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{5MCMCHPMRZCNPCM67J4KMMFPSS}

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	2026-05-18T01:35:34.134750Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eb04c11dec8e44d7899efa78a630af94ab2aec5610148788d3b5352ff1a9ddea

Aliases

arxiv: 1508.02131 · arxiv_version: 1508.02131v1 · doi: 10.48550/arxiv.1508.02131 · pith_short_12: 5MCMCHPMRZCN · pith_short_16: 5MCMCHPMRZCNPCM6 · pith_short_8: 5MCMCHPM

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/5MCMCHPMRZCNPCM67J4KMMFPSS \
  | 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: eb04c11dec8e44d7899efa78a630af94ab2aec5610148788d3b5352ff1a9ddea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a4a9e14f121d92e7a47f1e5a6c2ea11ea7e3c8f285c1b96f4b4df3fa4b5c9af",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2015-08-10T05:57:14Z",
    "title_canon_sha256": "a8952ea938de6df0740546abf9575b0b39c934d8146b63d73441535b58569e62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.02131",
    "kind": "arxiv",
    "version": 1
  }
}