Pith Number

pith:3YY2E7TV

pith:1999:3YY2E7TVVUMK5W2JIGBTC72PTV

not attested not anchored not stored refs pending

Constraints on the magnitude of alpha in dynamo theory

Eric G. Blackman (Caltech), George B. Field (Harvard/CFA)

arxiv:astro-ph/9903384 v2 · 1999-03-25 · 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{3YY2E7TVVUMK5W2JIGBTC72PTV}

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	2026-07-04T16:10:50.219874Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

de31a27e75ad18aedb494183317f4f9d693dca623ecf865e93cd7f19e8232697

Aliases

arxiv: astro-ph/9903384 · arxiv_version: astro-ph/9903384v2 · doi: 10.48550/arxiv.astro-ph/9903384 · pith_short_12: 3YY2E7TVVUMK · pith_short_16: 3YY2E7TVVUMK5W2J · pith_short_8: 3YY2E7TV

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/3YY2E7TVVUMK5W2JIGBTC72PTV \
  | 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: de31a27e75ad18aedb494183317f4f9d693dca623ecf865e93cd7f19e8232697

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8259b5555189ad54b8b15911abf2e45d6914bf99056eeff0381d5e7e8acd46c3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-03-25T22:48:54Z",
    "title_canon_sha256": "d322b65e7dacc8f6b0a3069660218b2fe20301795a7faa6d10fe7a0f9079ec39"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9903384",
    "kind": "arxiv",
    "version": 2
  }
}