Pith Number

pith:OSU6NUV4

pith:2024:OSU6NUV4JIJRQGSGOCBEVRQ5BM

not attested not anchored not stored refs pending

The Witt groups of extended quadratic forms over Z

Csaba Nagy, Diarmuid Crowley

arxiv:2404.09189 v2 · 2024-04-14 · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OSU6NUV4JIJRQGSGOCBEVRQ5BM}

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	2026-05-26T01:03:08.319849Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74a9e6d2bc4a13181a4670824ac61d0b0699b9e991f27bd408ea6c0a060b7824

Aliases

arxiv: 2404.09189 · arxiv_version: 2404.09189v2 · doi: 10.48550/arxiv.2404.09189 · pith_short_12: OSU6NUV4JIJR · pith_short_16: OSU6NUV4JIJRQGSG · pith_short_8: OSU6NUV4

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/OSU6NUV4JIJRQGSGOCBEVRQ5BM \
  | 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: 74a9e6d2bc4a13181a4670824ac61d0b0699b9e991f27bd408ea6c0a060b7824

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "540359a72c734858b1a52342e705f1d18b38b1a0c8db4345fb9687f12a2d1042",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2024-04-14T08:44:50Z",
    "title_canon_sha256": "fe1f7358412fe68b581e18aa2e80563ae8adc1f95cc6611fec6f00a31c403ec2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2404.09189",
    "kind": "arxiv",
    "version": 2
  }
}