Pith Number

pith:2PKAFD2G

pith:2018:2PKAFD2GUXIGL4DPOT3CPCIWZD

not attested not anchored not stored refs pending

Imbalanced learning for RR Lyrae stars

Jingyi Zhang, Yanxia Zhang, Yongheng Zhao

arxiv:1801.02293 v1 · 2018-01-08 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2PKAFD2GUXIGL4DPOT3CPCIWZD}

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	2026-05-18T00:26:32.138085Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3d4028f46a5d065f06f74f6278916c8cc1f4350b5708613e87af93651931404

Aliases

arxiv: 1801.02293 · arxiv_version: 1801.02293v1 · doi: 10.48550/arxiv.1801.02293 · pith_short_12: 2PKAFD2GUXIG · pith_short_16: 2PKAFD2GUXIGL4DP · pith_short_8: 2PKAFD2G

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/2PKAFD2GUXIGL4DPOT3CPCIWZD \
  | 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: d3d4028f46a5d065f06f74f6278916c8cc1f4350b5708613e87af93651931404

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25ccdf929c119ee3ad89dec2fa2544eee340c80df147a231414c1e743747970e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-01-08T02:47:45Z",
    "title_canon_sha256": "a2540a2ad22fb9b18370bc3332aacfb3a2f3f9f93392f6cce3b6986f9ea1d2d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.02293",
    "kind": "arxiv",
    "version": 1
  }
}