Pith Number

pith:DMHNG4XQ

pith:2014:DMHNG4XQXXPBUUHS5SOV24RVXE

not attested not anchored not stored refs pending

Unitary equivalence of normal matrices over topological spaces

Efton Park, Greg Friedman

arxiv:1409.1905 v3 · 2014-09-05 · math.OA · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DMHNG4XQXXPBUUHS5SOV24RVXE}

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	2026-05-17T23:57:21.955225Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b0ed372f0bdde1a50f2ec9d5d7235b93570945a4074fd321d34d7c8b31d8280

Aliases

arxiv: 1409.1905 · arxiv_version: 1409.1905v3 · doi: 10.48550/arxiv.1409.1905 · pith_short_12: DMHNG4XQXXPB · pith_short_16: DMHNG4XQXXPBUUHS · pith_short_8: DMHNG4XQ

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/DMHNG4XQXXPBUUHS5SOV24RVXE \
  | 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: 1b0ed372f0bdde1a50f2ec9d5d7235b93570945a4074fd321d34d7c8b31d8280

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1807f248269e96796ab1de0eac81ab7076e8f516a8a03cf7813cf6b9f7ac08c8",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2014-09-05T19:19:19Z",
    "title_canon_sha256": "4a1714e0dde6ebf7285f99c1127352f30ab1c5f1621f313a0c8a84e00e856e42"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.1905",
    "kind": "arxiv",
    "version": 3
  }
}