Pith Number

pith:WYBVA6JA

pith:2018:WYBVA6JAXHTMGVBFHSKIMOURU4

not attested not anchored not stored refs pending

On the convergence of discrete-time linear systems: A linear time-varying Mann iteration converges iff the operator is strictly pseudocontractive

Filippo Fabiani, Franco Blanchini, Giuseppe Belgioioso, Sergio Grammatico

arxiv:1803.10469 v1 · 2018-03-28 · math.OC · cs.GT · cs.SY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WYBVA6JAXHTMGVBFHSKIMOURU4}

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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	2026-05-18T00:19:55.300165Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b603507920b9e6c354253c94863a91a71eafd165346d633a8d4a9dc3de1d83ff

Aliases

arxiv: 1803.10469 · arxiv_version: 1803.10469v1 · doi: 10.48550/arxiv.1803.10469 · pith_short_12: WYBVA6JAXHTM · pith_short_16: WYBVA6JAXHTMGVBF · pith_short_8: WYBVA6JA

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/WYBVA6JAXHTMGVBFHSKIMOURU4 \
  | 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: b603507920b9e6c354253c94863a91a71eafd165346d633a8d4a9dc3de1d83ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8312e75ff72b4444d0dc0878bc6e873c404e3fdd19188beb128d04fb705c2503",
    "cross_cats_sorted": [
      "cs.GT",
      "cs.SY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-03-28T08:58:44Z",
    "title_canon_sha256": "e92ec554214f98f288d547cd39cb7ab25eb155bf52e93848dce504a3a70d3b0c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.10469",
    "kind": "arxiv",
    "version": 1
  }
}