Pith Number

pith:NQ5G2WWZ

pith:2013:NQ5G2WWZYPZ6JL42VQXJNF3OGV

not attested not anchored not stored refs pending

Near-optimal Frequency-weighted Interpolatory Model Reduction

Christopher Beattie, Serkan Gugercin, Tobias Breiten

arxiv:1309.0136 v2 · 2013-08-31 · cs.SY · math.DS · 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{NQ5G2WWZYPZ6JL42VQXJNF3OGV}

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	2026-05-18T01:03:24.433464Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c3a6d5ad9c3f3e4af9aac2e96976e35636bc479d9d14880ce2caf8ca22649e0

Aliases

arxiv: 1309.0136 · arxiv_version: 1309.0136v2 · doi: 10.48550/arxiv.1309.0136 · pith_short_12: NQ5G2WWZYPZ6 · pith_short_16: NQ5G2WWZYPZ6JL42 · pith_short_8: NQ5G2WWZ

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/NQ5G2WWZYPZ6JL42VQXJNF3OGV \
  | 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: 6c3a6d5ad9c3f3e4af9aac2e96976e35636bc479d9d14880ce2caf8ca22649e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8cdd00f7913a4757a28ac2388d35263e540685ad7cf5e40d6f918dc647bdc251",
    "cross_cats_sorted": [
      "math.DS",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2013-08-31T17:37:37Z",
    "title_canon_sha256": "e94b69f731389c318c1ad5124565f3f18cbf084117490ae0ed80d9d6904b923b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.0136",
    "kind": "arxiv",
    "version": 2
  }
}