Pith Number

pith:VK2BNEF4

pith:2015:VK2BNEF4JAIFHRLUDN4IHMLRRL

not attested not anchored not stored refs pending

Limitations of force-free magnetic field extrapolations: revisiting basic assumptions

H. Peter, J. Warnecke, L. P. Chitta, R. H. Cameron

arxiv:1510.04642 v1 · 2015-10-15 · 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{VK2BNEF4JAIFHRLUDN4IHMLRRL}

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	2026-05-18T01:26:09.370905Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aab41690bc481053c5741b7883b1718af64ac6d4e318b0dfa87b6beaf99cbbeb

Aliases

arxiv: 1510.04642 · arxiv_version: 1510.04642v1 · doi: 10.48550/arxiv.1510.04642 · pith_short_12: VK2BNEF4JAIF · pith_short_16: VK2BNEF4JAIFHRLU · pith_short_8: VK2BNEF4

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/VK2BNEF4JAIFHRLUDN4IHMLRRL \
  | 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: aab41690bc481053c5741b7883b1718af64ac6d4e318b0dfa87b6beaf99cbbeb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d941e7e270a62d05718ac71e6e85ec0f1a72bc40aa5d31b9d5cd88c210f52c86",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-10-15T17:44:33Z",
    "title_canon_sha256": "5df720e864e4fb59012502dde09dbff10ad89092398da18d389878e6fb75f500"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.04642",
    "kind": "arxiv",
    "version": 1
  }
}