Pith Number

pith:Y5ZYKBVN

pith:2026:Y5ZYKBVNPSQS3LHVSW4IUZSIHV

not attested not anchored not stored refs pending

FastQSL 2: A Comprehensive Toolkit for Magnetic Connectivity Analysis

Chaowei Jiang, Jun Chen, Li Feng, Rui Liu, Thomas Wiegelmann

FastQSL 2 traces magnetic field lines over the full sphere by switching to a second coordinate system near the poles.

arxiv:2604.16195 v2 · 2026-04-17 · astro-ph.SR

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\usepackage{pith}
\pithnumber{Y5ZYKBVNPSQS3LHVSW4IUZSIHV}

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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.

Claims

C1strongest claim

This version now supports spherical coordinates, utilizing a second spherical coordinate system for tracing magnetic field lines around the polar regions. This approach completely resolves the singularity problem at the two poles.

C2weakest assumption

That numerical field-line integration remains accurate and stable across the full sphere when switching between the two coordinate systems, with no quantified error analysis or validation against known analytic solutions provided in the abstract.

C3one line summary

FastQSL 2 extends prior magnetic connectivity software with spherical coordinate support that eliminates polar singularities, arbitrary output meshes, and direct computation of field lines plus current density for solar applications.

Receipt and verification

First computed	2026-06-25T01:17:53.119009Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c7738506ad7ca12dacf595b88a66483d5bc33dd00a473a48af320d3f61cfcb7e

Aliases

arxiv: 2604.16195 · arxiv_version: 2604.16195v2 · doi: 10.48550/arxiv.2604.16195 · pith_short_12: Y5ZYKBVNPSQS · pith_short_16: Y5ZYKBVNPSQS3LHV · pith_short_8: Y5ZYKBVN

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/Y5ZYKBVNPSQS3LHVSW4IUZSIHV \
  | 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: c7738506ad7ca12dacf595b88a66483d5bc33dd00a473a48af320d3f61cfcb7e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "caa5ed59612ab8473b8e7e8edd11dc0be654fe7d873011d74f4beb95ed84a78e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-04-17T16:04:17Z",
    "title_canon_sha256": "0567a7fa83369f1a619ab3a7ee17c072beddac728045605b85b7bb2a61e3fec2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.16195",
    "kind": "arxiv",
    "version": 2
  }
}