Pith Number

pith:XBTVIGJU

pith:2014:XBTVIGJUA6WPUREOWKWJF2ZFAO

not attested not anchored not stored refs pending

Combining pattern-based CRFs and weighted context-free grammars

Rustem Takhanov, Vladimir Kolmogorov

arxiv:1404.5475 v2 · 2014-04-22 · cs.FL · cs.DS · 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{XBTVIGJUA6WPUREOWKWJF2ZFAO}

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	2026-05-18T02:38:52.985554Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b86754193407acfa448eb2ac92eb250381262990e955edb3ce01f361dfe1a60f

Aliases

arxiv: 1404.5475 · arxiv_version: 1404.5475v2 · doi: 10.48550/arxiv.1404.5475 · pith_short_12: XBTVIGJUA6WP · pith_short_16: XBTVIGJUA6WPUREO · pith_short_8: XBTVIGJU

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/XBTVIGJUA6WPUREOWKWJF2ZFAO \
  | 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: b86754193407acfa448eb2ac92eb250381262990e955edb3ce01f361dfe1a60f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "24b555f092dd878c2e2795b4dcab48c3cd86c1536180af8b2e2130e1df1f511e",
    "cross_cats_sorted": [
      "cs.DS",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2014-04-22T12:44:42Z",
    "title_canon_sha256": "587766afbe9915f5d7dc8a37e13a7da179e5760510d545df883e6aa8a4794628"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.5475",
    "kind": "arxiv",
    "version": 2
  }
}