Pith Number

pith:P4ZDAHXT

pith:2019:P4ZDAHXTY63BU7ACPRGBOVD3SB

not attested not anchored not stored refs pending

Time-Varying Matrix Eigenanalyses via Zhang Neural Networks and look-Ahead Finite Difference Equations

Frank Uhlig, Yunong Zhang

arxiv:1904.10566 v1 · 2019-04-23 · 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{P4ZDAHXTY63BU7ACPRGBOVD3SB}

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	2026-05-17T23:47:53.384439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f32301ef3c7b61a7c027c4c17547b907a81ed5dbd2dc9b7a9fca3831e41f04d

Aliases

arxiv: 1904.10566 · arxiv_version: 1904.10566v1 · doi: 10.48550/arxiv.1904.10566 · pith_short_12: P4ZDAHXTY63B · pith_short_16: P4ZDAHXTY63BU7AC · pith_short_8: P4ZDAHXT

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/P4ZDAHXTY63BU7ACPRGBOVD3SB \
  | 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: 7f32301ef3c7b61a7c027c4c17547b907a81ed5dbd2dc9b7a9fca3831e41f04d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8fd2dd372bd72666bb63f7476c9e27327d5d7e662aede3e73688cafe8ca89fd9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-04-23T23:24:39Z",
    "title_canon_sha256": "3939c46d75f46940b134d741fc7727c153d99ad8fdee8be953a7978be2b7bb09"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.10566",
    "kind": "arxiv",
    "version": 1
  }
}