Pith Number

pith:VCULRPAD

pith:2013:VCULRPADFIV2D6RPSRAVVB2KLR

not attested not anchored not stored refs pending

Constructive Setting of the Density Ratio Estimation Problem and its Rigorous Solution

Igor Braga, Rauf Izmailov, Vladimir Vapnik

arxiv:1306.0407 v2 · 2013-06-03 · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VCULRPADFIV2D6RPSRAVVB2KLR}

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	2026-05-18T03:20:47.456531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8a8b8bc032a2ba1fa2f94415a874a5c55b8f83219f9124579e3791a867f9aa3

Aliases

arxiv: 1306.0407 · arxiv_version: 1306.0407v2 · doi: 10.48550/arxiv.1306.0407 · pith_short_12: VCULRPADFIV2 · pith_short_16: VCULRPADFIV2D6RP · pith_short_8: VCULRPAD

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/VCULRPADFIV2D6RPSRAVVB2KLR \
  | 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: a8a8b8bc032a2ba1fa2f94415a874a5c55b8f83219f9124579e3791a867f9aa3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3dcb793ea65990b965d56d8c766cc6d7a49362a492c8b96e2cb2a4ca6aae806",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2013-06-03T13:54:34Z",
    "title_canon_sha256": "e02b9935604fbbf28686448b8112a4272737fd93cff99a8d379133e3c84322bb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.0407",
    "kind": "arxiv",
    "version": 2
  }
}