Pith Number

pith:2WZJYOYI

pith:2009:2WZJYOYIURBFK6RILEMD3Y2WSF

not attested not anchored not stored refs pending

On orthogonal matrices maximizing the 1-norm

Benoit Collins, Jean-Marc Schlenker, Teodor Banica

arxiv:0901.2923 v1 · 2009-01-19 · math.FA · math.CO · math.OA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2WZJYOYIURBFK6RILEMD3Y2WSF}

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	2026-05-17T23:52:45.012689Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5b29c3b08a442557a2859183de356914c6ce8ed96725233e063a1ddb3273c82

Aliases

arxiv: 0901.2923 · arxiv_version: 0901.2923v1 · doi: 10.48550/arxiv.0901.2923 · pith_short_12: 2WZJYOYIURBF · pith_short_16: 2WZJYOYIURBFK6RI · pith_short_8: 2WZJYOYI

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/2WZJYOYIURBFK6RILEMD3Y2WSF \
  | 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: d5b29c3b08a442557a2859183de356914c6ce8ed96725233e063a1ddb3273c82

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8902531a016a2c65c76cf1fab9aa3bb1717fb0a9192c55003cea19adcf458ae",
    "cross_cats_sorted": [
      "math.CO",
      "math.OA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2009-01-19T20:32:18Z",
    "title_canon_sha256": "b3c360a66416172f4f42401b606fe5751818d1a6d19ea381d10175d910d06747"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2923",
    "kind": "arxiv",
    "version": 1
  }
}