Pith Number

pith:LFDTFNTS

pith:2015:LFDTFNTSYRRSRMD52SXBCIGZQU

not attested not anchored not stored refs pending

Equivalence relations between the Cortie and Zurich sunspot group morphological classifications

J.M. Vaquero, L. Lefevre, M.C. Gallego, V.M.S. Carrasco

arxiv:1503.08724 v1 · 2015-03-30 · 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{LFDTFNTSYRRSRMD52SXBCIGZQU}

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	2026-05-18T01:59:36.818519Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

594732b672c46328b07dd4ae1120d9850b4831373a3760947a3b138c07ea956b

Aliases

arxiv: 1503.08724 · arxiv_version: 1503.08724v1 · doi: 10.48550/arxiv.1503.08724 · pith_short_12: LFDTFNTSYRRS · pith_short_16: LFDTFNTSYRRSRMD5 · pith_short_8: LFDTFNTS

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/LFDTFNTSYRRSRMD52SXBCIGZQU \
  | 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: 594732b672c46328b07dd4ae1120d9850b4831373a3760947a3b138c07ea956b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9110ddf6329c9b663e9b97fb0cda03d4d731b833e740a023d76ada9df9457701",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-03-30T16:02:06Z",
    "title_canon_sha256": "8d4b12358197a41a6a876c5ece30c0899fc4bad93af98a667f88b95dc4d2148e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.08724",
    "kind": "arxiv",
    "version": 1
  }
}