Pith Number

pith:NBYLKAMS

pith:2018:NBYLKAMSFCWO6AM35Y2ZB4JXIS

not attested not anchored not stored refs pending

A Theorem of Fermat on Congruent Number Curves

Lorenz Halbeisen, Norbert Hungerb\"uhler

arxiv:1803.09604 v1 · 2018-03-26 · math.NT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NBYLKAMSFCWO6AM35Y2ZB4JXIS}

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	2026-05-18T00:20:10.939095Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6870b5019228acef019bee3590f1374481d54f3ba5ce713e3b77974ae639c518

Aliases

arxiv: 1803.09604 · arxiv_version: 1803.09604v1 · doi: 10.48550/arxiv.1803.09604 · pith_short_12: NBYLKAMSFCWO · pith_short_16: NBYLKAMSFCWO6AM3 · pith_short_8: NBYLKAMS

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/NBYLKAMSFCWO6AM35Y2ZB4JXIS \
  | 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: 6870b5019228acef019bee3590f1374481d54f3ba5ce713e3b77974ae639c518

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1166ba815e82e47e9f9ef903365f72dd83b41aee631ab25c59e8eb0df42cbf28",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2018-03-26T14:16:38Z",
    "title_canon_sha256": "ad12fd01b3615b9f417de9ceaacc85708ad7b2ded8cf0aceb26a56c4f2aae296"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.09604",
    "kind": "arxiv",
    "version": 1
  }
}