Pith Number

pith:Q6LWRJOG

pith:2021:Q6LWRJOGNTG4YGZ2BXMCYLVKBV

not attested not anchored not stored refs pending

Positive-Unlabeled Classification under Class-Prior Shift: A Prior-invariant Approach Based on Density Ratio Estimation

Masashi Sugiyama, Shota Nakajima

arxiv:2107.05045 v3 · 2021-07-11 · 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{Q6LWRJOGNTG4YGZ2BXMCYLVKBV}

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	2026-07-05T03:41:03.481053Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

879768a5c66ccdcc1b3a0dd82c2eaa0d4b7758b992a19b90874da0a24bdf4a78

Aliases

arxiv: 2107.05045 · arxiv_version: 2107.05045v3 · doi: 10.48550/arxiv.2107.05045 · pith_short_12: Q6LWRJOGNTG4 · pith_short_16: Q6LWRJOGNTG4YGZ2 · pith_short_8: Q6LWRJOG

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/Q6LWRJOGNTG4YGZ2BXMCYLVKBV \
  | 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: 879768a5c66ccdcc1b3a0dd82c2eaa0d4b7758b992a19b90874da0a24bdf4a78

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0812abfc3abf5bbce446adde3668596bef54765c481dfe3f57b47fa6c3b791af",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2021-07-11T13:36:53Z",
    "title_canon_sha256": "23fd7854d3ea8d963d0b83a15416bd48796cd9fb64a500f01deded31bf5e1a11"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.05045",
    "kind": "arxiv",
    "version": 3
  }
}