Pith Number

pith:2E7E7MMH

pith:2007:2E7E7MMH7XIUDRK77P22GLRRGJ

not attested not anchored not stored refs pending

A case for variational geomagnetic data assimilation: insights from a one-dimensional, nonlinear, and sparsely observed MHD system

Alexandre Fournier, C\'eline Eymin, Thierry Alboussi\`ere

arxiv:0705.1777 v1 · 2007-05-12 · physics.geo-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{2E7E7MMH7XIUDRK77P22GLRRGJ}

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	2026-05-18T01:29:12.403777Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d13e4fb187fdd141c55ffbf5a32e313242b5f5db9b76c45b6c1b462be13513e9

Aliases

arxiv: 0705.1777 · arxiv_version: 0705.1777v1 · doi: 10.48550/arxiv.0705.1777 · pith_short_12: 2E7E7MMH7XIU · pith_short_16: 2E7E7MMH7XIUDRK7 · pith_short_8: 2E7E7MMH

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/2E7E7MMH7XIUDRK77P22GLRRGJ \
  | 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: d13e4fb187fdd141c55ffbf5a32e313242b5f5db9b76c45b6c1b462be13513e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bee3f3f7721aaa6967a345de501fd0cda1a8d610a126f8cee543e811f151ab7f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.geo-ph",
    "submitted_at": "2007-05-12T14:57:50Z",
    "title_canon_sha256": "ec2394a4a3854862456325767b2f18b7825604520867e8f21c7dce362f3aa63b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0705.1777",
    "kind": "arxiv",
    "version": 1
  }
}