Pith Number

pith:T5ORE3P6

pith:2020:T5ORE3P67C2TXKAOJMNXRZDEJF

not attested not anchored not stored refs pending

Twice is enough for dangerous eigenvalues

Andrew Horning, Yuji Nakatsukasa

arxiv:2010.09710 v2 · 2020-10-19 · math.NA · cs.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{T5ORE3P67C2TXKAOJMNXRZDEJF}

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	2026-07-05T09:35:04.407214Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f5d126dfef8b53ba80e4b1b78e464497a33aeb68bbbdd27d86a18861e19d69b

Aliases

arxiv: 2010.09710 · arxiv_version: 2010.09710v2 · doi: 10.48550/arxiv.2010.09710 · pith_short_12: T5ORE3P67C2T · pith_short_16: T5ORE3P67C2TXKAO · pith_short_8: T5ORE3P6

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/T5ORE3P67C2TXKAOJMNXRZDEJF \
  | 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: 9f5d126dfef8b53ba80e4b1b78e464497a33aeb68bbbdd27d86a18861e19d69b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92ea0c1abdc4507c568160c7f8e5eb4c2cfc2653336f6c76211d2282e5ea9331",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2020-10-19T17:59:15Z",
    "title_canon_sha256": "8c73290511a0d7f6f88b7c252ea63ef535842ec6b83198427533eef83cd83d76"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2010.09710",
    "kind": "arxiv",
    "version": 2
  }
}