Pith Number

pith:RWNEPFQ3

pith:2015:RWNEPFQ3GH25AM7WNBMU5IMGKE

not attested not anchored not stored refs pending

Convergence of discrete-time Kalman filter estimate to continuous-time estimate for systems with unbounded observation

Atte Aalto

arxiv:1512.02473 v1 · 2015-12-08 · 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{RWNEPFQ3GH25AM7WNBMU5IMGKE}

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	2026-05-18T01:24:44.614608Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8d9a47961b31f5d033f668594ea186512cd8295cb0414491d0b05b9edb2a339d

Aliases

arxiv: 1512.02473 · arxiv_version: 1512.02473v1 · doi: 10.48550/arxiv.1512.02473 · pith_short_12: RWNEPFQ3GH25 · pith_short_16: RWNEPFQ3GH25AM7W · pith_short_8: RWNEPFQ3

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/RWNEPFQ3GH25AM7WNBMU5IMGKE \
  | 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: 8d9a47961b31f5d033f668594ea186512cd8295cb0414491d0b05b9edb2a339d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fea7135c21fb0615bf27587347bfac670e3eec19c539098229f1e7f397cf866",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-12-08T14:01:38Z",
    "title_canon_sha256": "46d399cff97b479ac459ac4f455e3b852fa596f1823728991e2a7b469721b2e6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.02473",
    "kind": "arxiv",
    "version": 1
  }
}