Pith Number

pith:3SH5I55A

pith:2015:3SH5I55A3KB53IL7L3E2QLHM7D

not attested not anchored not stored refs pending

What Makes it Difficult to Understand a Scientific Literature?

Dezhi Cheng, Jiao Tian, Jin Liu, Mengyun Cao, Xiaoping Sun

arxiv:1512.01409 v1 · 2015-12-04 · 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{3SH5I55A3KB53IL7L3E2QLHM7D}

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	2026-05-18T01:25:16.995570Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc8fd477a0da83dda17f5ec9a82cecf8d66f45e8ff466466861c226af0f87d2f

Aliases

arxiv: 1512.01409 · arxiv_version: 1512.01409v1 · doi: 10.48550/arxiv.1512.01409 · pith_short_12: 3SH5I55A3KB5 · pith_short_16: 3SH5I55A3KB53IL7 · pith_short_8: 3SH5I55A

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/3SH5I55A3KB53IL7L3E2QLHM7D \
  | 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: dc8fd477a0da83dda17f5ec9a82cecf8d66f45e8ff466466861c226af0f87d2f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "098f8f4e87c28e33f514a0f0f6a46bf62e01442782b560cd6df7cc320bc8f834",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2015-12-04T14:01:32Z",
    "title_canon_sha256": "34629f60eb3bb8dfa40c9f69bafefa494e80da04527781e52dc0791b44320284"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.01409",
    "kind": "arxiv",
    "version": 1
  }
}