Pith Number

pith:CPGD6OYC

pith:2026:CPGD6OYCK3WRT4DAT2UC2ADUZU

not attested not anchored not stored refs pending

Observed Fisher Information in hidden Markov models - Application to a noisy Gaussian random walk

Alexandra Lefebvre, Gr\'egory Nuel (LPSM (UMR\_8001))

arxiv:2606.02118 v1 · 2026-06-01 · stat.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CPGD6OYCK3WRT4DAT2UC2ADUZU}

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	2026-06-02T02:05:06.905527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

13cc3f3b0256ed19f0609ea82d0074cd25ec0e2f5aef6b0c7e9895c56d8171f6

Aliases

arxiv: 2606.02118 · arxiv_version: 2606.02118v1 · doi: 10.48550/arxiv.2606.02118 · pith_short_12: CPGD6OYCK3WR · pith_short_16: CPGD6OYCK3WRT4DA · pith_short_8: CPGD6OYC

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/CPGD6OYCK3WRT4DAT2UC2ADUZU \
  | 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: 13cc3f3b0256ed19f0609ea82d0074cd25ec0e2f5aef6b0c7e9895c56d8171f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d86a855dff4737a913635021082b0de1c5a6b0179801f5de43d2ee02bf76709",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.CO",
    "submitted_at": "2026-06-01T11:49:19Z",
    "title_canon_sha256": "dee607aa91bc31baec2cb928fd8668f50c82bfd636668c18f101a0a861aa1f0b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.02118",
    "kind": "arxiv",
    "version": 1
  }
}