Pith Number

pith:3IPM5CH2

pith:2011:3IPM5CH2QA577Y63OP4QGZS3IP

not attested not anchored not stored refs pending

Geomagnetic Semiannual Variation Is Not Overestimated and Is Not an Artifact of Systematic Solar Hemispheric Asymmetry

Leif Svalgaard

arxiv:1105.3241 v1 · 2011-05-16 · 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{3IPM5CH2QA577Y63OP4QGZS3IP}

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	2026-05-18T02:01:57.555618Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da1ece88fa803bffe3db73f903665b43f8c3e19a611717d6e134f2b88e735fbf

Aliases

arxiv: 1105.3241 · arxiv_version: 1105.3241v1 · doi: 10.48550/arxiv.1105.3241 · pith_short_12: 3IPM5CH2QA57 · pith_short_16: 3IPM5CH2QA577Y63 · pith_short_8: 3IPM5CH2

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/3IPM5CH2QA577Y63OP4QGZS3IP \
  | 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: da1ece88fa803bffe3db73f903665b43f8c3e19a611717d6e134f2b88e735fbf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c05cdddb6f8e17cedad354a0a6f7075b87b51caf560e467eae3f06b00edfab32",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-05-16T22:53:55Z",
    "title_canon_sha256": "44f270f22feb48e7243236a97d35a9f71730a8b98046de783f81ee1e8c09b00d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.3241",
    "kind": "arxiv",
    "version": 1
  }
}