Pith Number

pith:PSC3QMNR

pith:2013:PSC3QMNRSVU4VUHGC32YYGYTS2

not attested not anchored not stored refs pending

Discriminative Density-ratio Estimation

Ahmed K. Farahat, Mohamed S. Kamel, Yun-Qian Miao

arxiv:1311.4486 v2 · 2013-11-18 · 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{PSC3QMNRSVU4VUHGC32YYGYTS2}

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	2026-05-18T03:06:12.713939Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c85b831b19569cad0e616f58c1b1396ab37416eef1db28fbb71f362e776cffd

Aliases

arxiv: 1311.4486 · arxiv_version: 1311.4486v2 · doi: 10.48550/arxiv.1311.4486 · pith_short_12: PSC3QMNRSVU4 · pith_short_16: PSC3QMNRSVU4VUHG · pith_short_8: PSC3QMNR

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/PSC3QMNRSVU4VUHGC32YYGYTS2 \
  | 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: 7c85b831b19569cad0e616f58c1b1396ab37416eef1db28fbb71f362e776cffd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "823d4824f9af3a54159965f7bd9f51b2f58f64779f00b1278f451058cc98ba33",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-11-18T18:41:20Z",
    "title_canon_sha256": "38629aa8facb268c9b780a0fcdc1a8a48c0fd98c6a4d9e47e2578287d17e8a0c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.4486",
    "kind": "arxiv",
    "version": 2
  }
}