Pith Number

pith:GRXPD5CO

pith:2012:GRXPD5CO7O5DZRRWVQMDFVSH7X

not attested not anchored not stored refs pending

Interpolatory Weighted-H2 Model Reduction

Athanasios C. Antoulas, Branimir Anic, Christopher A. Beattie, Serkan Gugercin

arxiv:1201.2592 v2 · 2012-01-12 · math.NA · cs.SY · math.DS · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GRXPD5CO7O5DZRRWVQMDFVSH7X}

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	2026-05-18T03:14:30.524871Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

346ef1f44efbba3cc636ac1832d647fdc4c500875311237cc404e6661ae7b82e

Aliases

arxiv: 1201.2592 · arxiv_version: 1201.2592v2 · doi: 10.48550/arxiv.1201.2592 · pith_short_12: GRXPD5CO7O5D · pith_short_16: GRXPD5CO7O5DZRRW · pith_short_8: GRXPD5CO

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/GRXPD5CO7O5DZRRWVQMDFVSH7X \
  | 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: 346ef1f44efbba3cc636ac1832d647fdc4c500875311237cc404e6661ae7b82e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6315f9cbdcc379210e0db51888ef86667132bb2a9c91908eef904d21de56aa85",
    "cross_cats_sorted": [
      "cs.SY",
      "math.DS",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2012-01-12T15:28:20Z",
    "title_canon_sha256": "f9c194e94a04cac7e7c3b742175822be724cbaefe80ddc854d3c9c7fca179d1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.2592",
    "kind": "arxiv",
    "version": 2
  }
}