Pith Number

pith:V6IEY5FP

pith:2015:V6IEY5FPMBUJDSJ7TD25QC65GI

not attested not anchored not stored refs pending

The Karlqvist approximation revisited

C. Tannous

arxiv:1504.07625 v1 · 2015-04-28 · physics.class-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{V6IEY5FPMBUJDSJ7TD25QC65GI}

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	2026-05-18T02:17:32.727365Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

af904c74af606891c93f98f5d80bdd321ca6eafb1d19ed922c257b984199c927

Aliases

arxiv: 1504.07625 · arxiv_version: 1504.07625v1 · doi: 10.48550/arxiv.1504.07625 · pith_short_12: V6IEY5FPMBUJ · pith_short_16: V6IEY5FPMBUJDSJ7 · pith_short_8: V6IEY5FP

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/V6IEY5FPMBUJDSJ7TD25QC65GI \
  | 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: af904c74af606891c93f98f5d80bdd321ca6eafb1d19ed922c257b984199c927

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c87229173deda1ba3efa518fced544e069bcdd857c128bb8a0a5c928ab227bd4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2015-04-28T17:33:17Z",
    "title_canon_sha256": "2e2727da820690ac3a7f63a84e451de7401a96214a77d63ca829e5fa03de00af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.07625",
    "kind": "arxiv",
    "version": 1
  }
}