Pith Number

pith:CNLKCYZR

pith:2018:CNLKCYZR2H3ODJ3HY6PA67Q7XA

not attested not anchored not stored refs pending

Universal Quadratic Forms and Indecomposables over Biquadratic Fields

Dominik Lachman, Josef Svoboda, Krist\'yna Zemkov\'a, Magdal\'ena Tinkov\'a, Martin \v{C}ech

arxiv:1802.07811 v1 · 2018-02-21 · 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{CNLKCYZR2H3ODJ3HY6PA67Q7XA}

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	2026-05-18T00:22:48.830855Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1356a16331d1f6e1a767c79e0f7e1fb82bf638b286f0f802be13a16cb60cff19

Aliases

arxiv: 1802.07811 · arxiv_version: 1802.07811v1 · doi: 10.48550/arxiv.1802.07811 · pith_short_12: CNLKCYZR2H3O · pith_short_16: CNLKCYZR2H3ODJ3H · pith_short_8: CNLKCYZR

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/CNLKCYZR2H3ODJ3HY6PA67Q7XA \
  | 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: 1356a16331d1f6e1a767c79e0f7e1fb82bf638b286f0f802be13a16cb60cff19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df333d6273faf07e148796be6b3ba831f6e519570fa0924e99d4c42e3eae4d4f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2018-02-21T21:14:09Z",
    "title_canon_sha256": "d7d6c477c00dfd9baf568c5344daad8f08e96868c4615bd75d8fc7339751dba3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.07811",
    "kind": "arxiv",
    "version": 1
  }
}