Pith Number

pith:AQ63UB6I

pith:2013:AQ63UB6IYRWLCJVHVDO6ZBS6TM

not attested not anchored not stored refs pending

Spectra of a class of non-self-adjoint matrices

E. Brian Davies, Michael Levitin

arxiv:1311.6741 v1 · 2013-11-26 · math.SP · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AQ63UB6IYRWLCJVHVDO6ZBS6TM}

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	2026-05-18T02:52:12.223437Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

043dba07c8c46cb126a7a8ddec865e9b2d8a756cd810b9bdfff92c6ebfadb7d8

Aliases

arxiv: 1311.6741 · arxiv_version: 1311.6741v1 · doi: 10.48550/arxiv.1311.6741 · pith_short_12: AQ63UB6IYRWL · pith_short_16: AQ63UB6IYRWLCJVH · pith_short_8: AQ63UB6I

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/AQ63UB6IYRWLCJVHVDO6ZBS6TM \
  | 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: 043dba07c8c46cb126a7a8ddec865e9b2d8a756cd810b9bdfff92c6ebfadb7d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38070c0e29df45738b41e6b3756b3855f4a7168fdbbd3d53c59770583326d717",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SP",
    "submitted_at": "2013-11-26T17:17:17Z",
    "title_canon_sha256": "3e3125da3f75089cfeebe309f4dcad3342d230e4facb91f1d02ba9954dcd900c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.6741",
    "kind": "arxiv",
    "version": 1
  }
}