Pith Number

pith:JR4NZMSE

pith:2013:JR4NZMSEVV6CN7BVFE62T5LE5T

not attested not anchored not stored refs pending

An informal introduction to perturbations of matrices determined up to similarity or congruence

Lena Klimenko, Vladimir V. Sergeichuk

arxiv:1311.1144 v2 · 2013-11-04 · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JR4NZMSEVV6CN7BVFE62T5LE5T}

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	2026-05-18T02:31:48.087872Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c78dcb244ad7c26fc35293da9f564ece0ee273554cf49a4debd53e6b9e8aa99

Aliases

arxiv: 1311.1144 · arxiv_version: 1311.1144v2 · doi: 10.48550/arxiv.1311.1144 · pith_short_12: JR4NZMSEVV6C · pith_short_16: JR4NZMSEVV6CN7BV · pith_short_8: JR4NZMSE

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/JR4NZMSEVV6CN7BVFE62T5LE5T \
  | 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: 4c78dcb244ad7c26fc35293da9f564ece0ee273554cf49a4debd53e6b9e8aa99

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4f30507432f2b828ed671bf31b32deb93a07d47d26e128412d0a79b660e5b2f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2013-11-04T19:08:23Z",
    "title_canon_sha256": "e28c50fad5b0321965e3f3744904a1b01379c099752f04786365fce84cc049c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.1144",
    "kind": "arxiv",
    "version": 2
  }
}