Pith Number

pith:LEKBPSDX

pith:2020:LEKBPSDXMI66YQUPWLNSPCP5WA

not attested not anchored not stored refs pending

How well can we determine ages and chemical abundances from spectral fitting of integrated light spectra?

Christopher Usher, Geraldo Gon\c{c}alves, Paula Coelho, Ricardo Schiavon

arxiv:2010.02940 v1 · 2020-10-06 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LEKBPSDXMI66YQUPWLNSPCP5WA}

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	2026-07-05T01:42:47.614940Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

591417c877623dec428fb2db2789fdb01b2d07ff6aad37db16f5944ed84c84ac

Aliases

arxiv: 2010.02940 · arxiv_version: 2010.02940v1 · doi: 10.48550/arxiv.2010.02940 · pith_short_12: LEKBPSDXMI66 · pith_short_16: LEKBPSDXMI66YQUP · pith_short_8: LEKBPSDX

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/LEKBPSDXMI66YQUPWLNSPCP5WA \
  | 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: 591417c877623dec428fb2db2789fdb01b2d07ff6aad37db16f5944ed84c84ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ae320d852b02de3ca44f5d27260b0023135cfa88978b3c8cd7e379fdc8b6f3c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-10-06T18:00:04Z",
    "title_canon_sha256": "ab25e0c33f5f6a104779a4c9a4cfa31237b742b36137bd2475bd3e1b08025f41"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2010.02940",
    "kind": "arxiv",
    "version": 1
  }
}