Pith Number

pith:64F5FBBC

pith:2013:64F5FBBCPUXKQWSNHBG7FFBUQX

not attested not anchored not stored refs pending

A New Strategy of Cost-Free Learning in the Class Imbalance Problem

Bao-Gang Hu, Xiaowan Zhang

arxiv:1307.5730 v1 · 2013-07-22 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{64F5FBBCPUXKQWSNHBG7FFBUQX}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:17:54.756466Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f70bd284227d2ea85a4d384df2943485eb984dfa122806b4c1c5f1b2f8893ac8

Aliases

arxiv: 1307.5730 · arxiv_version: 1307.5730v1 · doi: 10.48550/arxiv.1307.5730 · pith_short_12: 64F5FBBCPUXK · pith_short_16: 64F5FBBCPUXKQWSN · pith_short_8: 64F5FBBC

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/64F5FBBCPUXKQWSNHBG7FFBUQX \
  | 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: f70bd284227d2ea85a4d384df2943485eb984dfa122806b4c1c5f1b2f8893ac8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab49796ad1e331e8dee285114c2fab76e65d0201cca9578e58723c7070307978",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-07-22T14:36:03Z",
    "title_canon_sha256": "5f1d4346a78ccfe9444b53147cb2cfbaf4c16aeb15531841cb8c6a4f99691dd1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.5730",
    "kind": "arxiv",
    "version": 1
  }
}