Pith Number

pith:K4Q42LAP

pith:2000:K4Q42LAP2WSDGFS4OVHTXBM7RR

not attested not anchored not stored refs pending

Conservation of Magnetic Helicity and Its Constraint on $\alpha$-Effect of Dynamo Theory

George B. Field, Hongsong Chou

arxiv:astro-ph/0011548 v2 · 2000-11-29 · 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{K4Q42LAP2WSDGFS4OVHTXBM7RR}

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	2026-07-04T14:10:54.779169Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5721cd2c0fd5a433165c754f3b859f8c7497f9e9f959c56dbcd9709da98568a0

Aliases

arxiv: astro-ph/0011548 · arxiv_version: astro-ph/0011548v2 · doi: 10.48550/arxiv.astro-ph/0011548 · pith_short_12: K4Q42LAP2WSD · pith_short_16: K4Q42LAP2WSDGFS4 · pith_short_8: K4Q42LAP

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/K4Q42LAP2WSDGFS4OVHTXBM7RR \
  | 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: 5721cd2c0fd5a433165c754f3b859f8c7497f9e9f959c56dbcd9709da98568a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "712d424ba06a0fd16ea131a8e41914e0b4f46e5397b36ea82ddeff7c8760b033",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-11-29T17:28:23Z",
    "title_canon_sha256": "18518e12b14399a550bf29ac9deddf8315c62685038cb7965777f1de0146a2c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0011548",
    "kind": "arxiv",
    "version": 2
  }
}