Pith Number

pith:SW5WMHWW

pith:2019:SW5WMHWW5N775MM466DTBMHJ6V

not attested not anchored not stored refs pending

Numerical computation and new output bounds for time-limited balanced truncation of discrete-time systems

Igor Pontes Duff, Patrick K\"urschner

arxiv:1902.01652 v1 · 2019-02-05 · 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{SW5WMHWW5N775MM466DTBMHJ6V}

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	2026-05-17T23:54:47.068664Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

95bb661ed6eb7ffeb19cf78730b0e9f54a53d7a4636beb4b223da0f2c1575317

Aliases

arxiv: 1902.01652 · arxiv_version: 1902.01652v1 · doi: 10.48550/arxiv.1902.01652 · pith_short_12: SW5WMHWW5N77 · pith_short_16: SW5WMHWW5N775MM4 · pith_short_8: SW5WMHWW

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/SW5WMHWW5N775MM466DTBMHJ6V \
  | 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: 95bb661ed6eb7ffeb19cf78730b0e9f54a53d7a4636beb4b223da0f2c1575317

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1615aa679f34c407f6c415760b6068ad7009d0ff09ca40290eced7f141a6427",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-02-05T12:03:32Z",
    "title_canon_sha256": "c6992658b8dc3dc51027b59ea3497c4939492880b80a2f5c7b3c011645077f00"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.01652",
    "kind": "arxiv",
    "version": 1
  }
}