Pith Number

pith:MV3PO7MY

pith:2012:MV3PO7MYCUQYY6JVUP4QM2ZWPY

not attested not anchored not stored refs pending

Structure-preserving Schur methods for computing square roots of real skew-Hamiltonian matrices

Carla Ferreira, Rui Ralha, Yulin Zhang, Zhongyun Liu

arxiv:1201.5055 v1 · 2012-01-24 · 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{MV3PO7MYCUQYY6JVUP4QM2ZWPY}

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	2026-05-18T04:03:56.413837Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6576f77d9815218c7935a3f9066b367e3771951be700efb16f1ae32bc6fb6492

Aliases

arxiv: 1201.5055 · arxiv_version: 1201.5055v1 · doi: 10.48550/arxiv.1201.5055 · pith_short_12: MV3PO7MYCUQY · pith_short_16: MV3PO7MYCUQYY6JV · pith_short_8: MV3PO7MY

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/MV3PO7MYCUQYY6JVUP4QM2ZWPY \
  | 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: 6576f77d9815218c7935a3f9066b367e3771951be700efb16f1ae32bc6fb6492

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5bb281423fe48572c9634f4e819b1b816a0f7f79c01d0a0349b11b74676ca1d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2012-01-24T17:09:39Z",
    "title_canon_sha256": "7eb3537dec243cd61fc6291b49a1cddd94bd7e1ea26d705874ebf1555851bf88"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.5055",
    "kind": "arxiv",
    "version": 1
  }
}