Pith Number

pith:X2Q4XOSZ

pith:2019:X2Q4XOSZFAZGNX6WTCPGBICOPH

not attested not anchored not stored refs pending

A Principal Component Analysis-based method to analyse high-resolution spectroscopic data

G. Micela, G. Tinetti, M. Damiano

arxiv:1906.11218 v1 · 2019-06-26 · astro-ph.EP · astro-ph.IM · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{X2Q4XOSZFAZGNX6WTCPGBICOPH}

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	2026-05-17T23:42:09.360961Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bea1cbba59283266dfd6989e60a04e79e37ed7b57229e880de94e8a3347f34ee

Aliases

arxiv: 1906.11218 · arxiv_version: 1906.11218v1 · doi: 10.48550/arxiv.1906.11218 · pith_short_12: X2Q4XOSZFAZG · pith_short_16: X2Q4XOSZFAZGNX6W · pith_short_8: X2Q4XOSZ

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/X2Q4XOSZFAZGNX6WTCPGBICOPH \
  | 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: bea1cbba59283266dfd6989e60a04e79e37ed7b57229e880de94e8a3347f34ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "677cf33ded9575ced23619bb09737dd804967715d31db73793d33602e415bf8c",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2019-06-26T17:17:29Z",
    "title_canon_sha256": "9d89bb2b94538b3d0a414bbbbc63817ef9bd4427b77a73f04796a156ee2889d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.11218",
    "kind": "arxiv",
    "version": 1
  }
}