Pith Number

pith:QCUCVJ2E

pith:1998:QCUCVJ2ESKKTDRG3VHQF4NIG5W

not attested not anchored not stored refs pending

Metallicity effects on the chromospheric activity-age relation for late-type dwarfs

H. J. Rocha-Pinto, W. J. Maciel (IAG/USP-Brazil)

arxiv:astro-ph/9803219 v1 · 1998-03-18 · 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{QCUCVJ2ESKKTDRG3VHQF4NIG5W}

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	2026-05-18T01:07:37.730923Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80a82aa744929531c4dba9e05e3506edbc76e3a41af71dce797d7d9ba9d0ed5d

Aliases

arxiv: astro-ph/9803219 · arxiv_version: astro-ph/9803219v1 · doi: 10.48550/arxiv.astro-ph/9803219 · pith_short_12: QCUCVJ2ESKKT · pith_short_16: QCUCVJ2ESKKTDRG3 · pith_short_8: QCUCVJ2E

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/QCUCVJ2ESKKTDRG3VHQF4NIG5W \
  | 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: 80a82aa744929531c4dba9e05e3506edbc76e3a41af71dce797d7d9ba9d0ed5d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8852eaccb053e5824d4a85a56e0c2b29a2565903f26c3aaef932e860e5fcd9dc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-03-18T21:56:36Z",
    "title_canon_sha256": "37f25330fc7ed093bb499fe7418c5a37fc9e68d4ca6563b2e9ee78be548dcc57"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9803219",
    "kind": "arxiv",
    "version": 1
  }
}