Pith Number

pith:6K7RG4I4

pith:2009:6K7RG4I4WNNMG5FFB4LLVVN6CE

not attested not anchored not stored refs pending

On the Metal-Richness of M Dwarfs with Planets

John A. Johnson, Kevin Apps

arxiv:0904.3092 v2 · 2009-04-20 · astro-ph.EP · 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{6K7RG4I4WNNMG5FFB4LLVVN6CE}

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	2026-05-18T04:29:43.402998Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f2bf13711cb35ac374a50f16bad5be11329e59cbea54b85f2ec085445cd1eb0c

Aliases

arxiv: 0904.3092 · arxiv_version: 0904.3092v2 · doi: 10.48550/arxiv.0904.3092 · pith_short_12: 6K7RG4I4WNNM · pith_short_16: 6K7RG4I4WNNMG5FF · pith_short_8: 6K7RG4I4

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/6K7RG4I4WNNMG5FFB4LLVVN6CE \
  | 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: f2bf13711cb35ac374a50f16bad5be11329e59cbea54b85f2ec085445cd1eb0c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7187f42347d191fd54b24ebfe0c0d77196bbc8fe39bf34b9859022a102131fa5",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-04-20T19:18:59Z",
    "title_canon_sha256": "3d243c0bc0706b8dbde76d13a662de7a69c49fccbb31430fe9722ef990379bbf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.3092",
    "kind": "arxiv",
    "version": 2
  }
}