Pith Number

pith:H5EEL7DM

pith:2016:H5EEL7DM2W4BGGET6JNWYNKPVH

not attested not anchored not stored refs pending

Iterative observer-based state and parameter estimation for linear systems

Atte Aalto

arxiv:1609.06959 v1 · 2016-09-22 · 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{H5EEL7DM2W4BGGET6JNWYNKPVH}

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	2026-05-18T01:04:04.744245Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f4845fc6cd5b8131893f25b6c354fa9dd8d18650a6e8513a3c56b4680af823c

Aliases

arxiv: 1609.06959 · arxiv_version: 1609.06959v1 · doi: 10.48550/arxiv.1609.06959 · pith_short_12: H5EEL7DM2W4B · pith_short_16: H5EEL7DM2W4BGGET · pith_short_8: H5EEL7DM

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/H5EEL7DM2W4BGGET6JNWYNKPVH \
  | 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: 3f4845fc6cd5b8131893f25b6c354fa9dd8d18650a6e8513a3c56b4680af823c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d1d32135738bc7efa5eb253b084f1383447c9475030051e87efe9e9bcd55d88",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2016-09-22T13:16:19Z",
    "title_canon_sha256": "42e91b0227f2f48d0ea11b8a89554159c66ddc601eb8c1143c03c733960bb7a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.06959",
    "kind": "arxiv",
    "version": 1
  }
}