Pith Number

pith:2TZDUNLG

pith:2013:2TZDUNLGOQ7WDJANNG3ZS5ZNNK

not attested not anchored not stored refs pending

Kernel-based Distance Metric Learning in the Output Space

Cong Li, Georgios C. Anagnostopoulos, Michael Georgiopoulos

arxiv:1312.2578 v2 · 2013-12-09 · 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{2TZDUNLGOQ7WDJANNG3ZS5ZNNK}

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	2026-05-18T02:52:58.085077Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4f23a3566743f61a40d69b799772d6a82b69e10580143fc7d186f3b0167c445

Aliases

arxiv: 1312.2578 · arxiv_version: 1312.2578v2 · doi: 10.48550/arxiv.1312.2578 · pith_short_12: 2TZDUNLGOQ7W · pith_short_16: 2TZDUNLGOQ7WDJAN · pith_short_8: 2TZDUNLG

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/2TZDUNLGOQ7WDJANNG3ZS5ZNNK \
  | 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: d4f23a3566743f61a40d69b799772d6a82b69e10580143fc7d186f3b0167c445

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2cc54d51c295f7bbaa56d84854c657de2c896b683d0f66464817db7c1a89698c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-12-09T20:58:16Z",
    "title_canon_sha256": "db391141a4ecbe7dc0c54fe51194cf22fe6047d87f562f19d085070dd44602ef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.2578",
    "kind": "arxiv",
    "version": 2
  }
}