Pith Number

pith:6NMMU64Z

pith:2006:6NMMU64ZL7L55CKYFTMUD6HHFB

not attested not anchored not stored refs pending

MHD simulations of penumbra fine structure

(2) NBI, (3) Institute for Solar Physics, (4) MPI, A. Nordlund (2), Cambridge, Copenhagen, Garching), G. B. Scharmer (3), H. C. Spruit (4) ((1) DAMPT, Stockholm, T. Heinemann (1)

arxiv:astro-ph/0612648 v2 · 2006-12-21 · 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{6NMMU64ZL7L55CKYFTMUD6HHFB}

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	2026-07-04T16:59:54.022306Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f358ca7b995fd7de89582cd941f8e728768aba9b07054f6c2f59cb430a5bf7f7

Aliases

arxiv: astro-ph/0612648 · arxiv_version: astro-ph/0612648v2 · doi: 10.48550/arxiv.astro-ph/0612648 · pith_short_12: 6NMMU64ZL7L5 · pith_short_16: 6NMMU64ZL7L55CKY · pith_short_8: 6NMMU64Z

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/6NMMU64ZL7L55CKYFTMUD6HHFB \
  | 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: f358ca7b995fd7de89582cd941f8e728768aba9b07054f6c2f59cb430a5bf7f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "81ece5916b60844438e6b6249c0e55691c0859b2eadfb6a603838399a80225d7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-12-21T20:55:36Z",
    "title_canon_sha256": "7fb0107ee24f87caa9454e01a52752925bbe3194d67b16110e2cbd8994a9a90e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0612648",
    "kind": "arxiv",
    "version": 2
  }
}