Pith Number

pith:7RGJB2Y7

pith:2018:7RGJB2Y7PX7KXAM72KAMHOEXWU

not attested not anchored not stored refs pending

Zolotarev Iterations for the Matrix Square Root

Evan S. Gawlik

arxiv:1804.11000 v1 · 2018-04-29 · 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{7RGJB2Y7PX7KXAM72KAMHOEXWU}

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	2026-05-18T00:17:14.933348Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc4c90eb1f7dfeab819fd280c3b897b5232cd81c558c023b4281d42b4c3525ad

Aliases

arxiv: 1804.11000 · arxiv_version: 1804.11000v1 · doi: 10.48550/arxiv.1804.11000 · pith_short_12: 7RGJB2Y7PX7K · pith_short_16: 7RGJB2Y7PX7KXAM7 · pith_short_8: 7RGJB2Y7

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/7RGJB2Y7PX7KXAM72KAMHOEXWU \
  | 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: fc4c90eb1f7dfeab819fd280c3b897b5232cd81c558c023b4281d42b4c3525ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15d5f584d5f26207662c479042dfcffa4281d0c7bf9562355aa9fbcad3aedbfc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-04-29T23:02:29Z",
    "title_canon_sha256": "c68d9b06caf4e76d9ec5373f074544b0fb077325540a54e2484073be0bc422a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.11000",
    "kind": "arxiv",
    "version": 1
  }
}