Pith Number

pith:WPJV2DM7

pith:2018:WPJV2DM7L2QZAANAKSIWZOP5QS

not attested not anchored not stored refs pending

Characterization of Type Ia Supernova Light Curves Using Principal Component Analysis of Sparse Functional Data

Jianhua Z. Huang, Lifan Wang, Shiyuan He

arxiv:1802.06125 v1 · 2018-02-16 · astro-ph.SR · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WPJV2DM7L2QZAANAKSIWZOP5QS}

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	2026-05-18T00:17:04.828004Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3d35d0d9f5ea19001a054916cb9fd84b4292d0485d33f3d67fa9de6d268dada

Aliases

arxiv: 1802.06125 · arxiv_version: 1802.06125v1 · doi: 10.48550/arxiv.1802.06125 · pith_short_12: WPJV2DM7L2QZ · pith_short_16: WPJV2DM7L2QZAANA · pith_short_8: WPJV2DM7

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/WPJV2DM7L2QZAANAKSIWZOP5QS \
  | 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: b3d35d0d9f5ea19001a054916cb9fd84b4292d0485d33f3d67fa9de6d268dada

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "382f4a7d37a76fc9efaabcc9668a637b6b70777f29968169a7d766fb58e9502e",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-02-16T21:18:23Z",
    "title_canon_sha256": "0f93daa2fe7c615acb7842e4d4e5e204e0e547c1cffa2e170acdbb7c63527393"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.06125",
    "kind": "arxiv",
    "version": 1
  }
}