Pith Number

pith:236BL7LE

pith:2013:236BL7LEXXBTY42SKMTKNPHLTS

not attested not anchored not stored refs pending

Implementing an analytical formula for calculating M(3000)F2 in the ionosonde operated in Havana

Alexander Calzadilla, Arian Ojeda Gonz\'alez, Katy Alazo, Silvio Gonz\'alez

arxiv:1308.0245 v1 · 2013-08-01 · physics.space-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{236BL7LEXXBTY42SKMTKNPHLTS}

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	2026-05-18T03:16:59.496512Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d6fc15fd64bdc33c73525326a6bceb9ca79110ede36dc3491c2700aca7be9a3d

Aliases

arxiv: 1308.0245 · arxiv_version: 1308.0245v1 · doi: 10.48550/arxiv.1308.0245 · pith_short_12: 236BL7LEXXBT · pith_short_16: 236BL7LEXXBTY42S · pith_short_8: 236BL7LE

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/236BL7LEXXBTY42SKMTKNPHLTS \
  | 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: d6fc15fd64bdc33c73525326a6bceb9ca79110ede36dc3491c2700aca7be9a3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e1c809578fafcc377b0d2e296967d69b4e7d2c28d83d073ab20c7ba677d2445",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.space-ph",
    "submitted_at": "2013-08-01T15:38:35Z",
    "title_canon_sha256": "51925a1a3dd1c73385159f2eabf18850f4d208d9935d5568e8850478f59a9ef1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.0245",
    "kind": "arxiv",
    "version": 1
  }
}