Pith Number

pith:OCWHP4YN

pith:2016:OCWHP4YN24WE6DEGFCQMINOBUJ

not attested not anchored not stored refs pending

Approximated structured pseudospectra

Lothar Reichel, Silvia Noschese

arxiv:1611.04415 v1 · 2016-11-14 · 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{OCWHP4YN24WE6DEGFCQMINOBUJ}

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	2026-05-18T00:58:50.491305Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

70ac77f30dd72c4f0c8628a0c435c1a2590a6f3b04679c9d5bc88d9f197bc28c

Aliases

arxiv: 1611.04415 · arxiv_version: 1611.04415v1 · doi: 10.48550/arxiv.1611.04415 · pith_short_12: OCWHP4YN24WE · pith_short_16: OCWHP4YN24WE6DEG · pith_short_8: OCWHP4YN

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/OCWHP4YN24WE6DEGFCQMINOBUJ \
  | 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: 70ac77f30dd72c4f0c8628a0c435c1a2590a6f3b04679c9d5bc88d9f197bc28c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a9aa53f4aac5f7e6e8279207744dbe582b7ba8012f29453c262c693e2cd0ed1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-11-14T15:20:03Z",
    "title_canon_sha256": "9f3627a4e6d60ac6bdf6d26b6f844b8543d9ca55646654514b6f289717ceb96d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.04415",
    "kind": "arxiv",
    "version": 1
  }
}