Pith Number

pith:CIK454F2

pith:2007:CIK454F2SBE3P5YSFA5QWBJ4AB

not attested not anchored not stored refs pending

Principal component analysis - an efficient tool for variable stars diagnostics

Zdenek Mikulasek

arxiv:astro-ph/0703467 v2 · 2007-03-17 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CIK454F2SBE3P5YSFA5QWBJ4AB}

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	2026-05-18T01:40:26.837157Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1215cef0ba9049b7f712283b0b053c007970a607022bea228f8147d300cf6c08

Aliases

arxiv: astro-ph/0703467 · arxiv_version: astro-ph/0703467v2 · doi: 10.48550/arxiv.astro-ph/0703467 · pith_short_12: CIK454F2SBE3 · pith_short_16: CIK454F2SBE3P5YS · pith_short_8: CIK454F2

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/CIK454F2SBE3P5YSFA5QWBJ4AB \
  | 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: 1215cef0ba9049b7f712283b0b053c007970a607022bea228f8147d300cf6c08

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8492d08b7c1d229559d9897840f80d6cab75a62ee700e88abdb6455c054dd746",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-03-17T13:42:48Z",
    "title_canon_sha256": "b9408052d94dfff2e5c8c2b992ad1ab5413fa85893850696e335dd5aedd7b243"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0703467",
    "kind": "arxiv",
    "version": 2
  }
}