Pith Number

pith:J57NQIHO

pith:2011:J57NQIHO4KBZLCYM7CHLRAVX5O

not attested not anchored not stored refs pending

An Augmented Observer for the Distributed Estimation Problem for LTI Systems

Nuno C. Martins, Shinkyu Park

arxiv:1112.0835 v3 · 2011-12-05 · 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{J57NQIHO4KBZLCYM7CHLRAVX5O}

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	2026-05-18T04:00:00.967298Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f7ed820eee283958b0cf88eb882b7eb8df832255c669012d13fb5f8bec4ec19

Aliases

arxiv: 1112.0835 · arxiv_version: 1112.0835v3 · doi: 10.48550/arxiv.1112.0835 · pith_short_12: J57NQIHO4KBZ · pith_short_16: J57NQIHO4KBZLCYM · pith_short_8: J57NQIHO

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/J57NQIHO4KBZLCYM7CHLRAVX5O \
  | 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: 4f7ed820eee283958b0cf88eb882b7eb8df832255c669012d13fb5f8bec4ec19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "43cdc382e1bc599bc753249bb00225efc90ae0a1e0c9a01a46ad79e6e4ca5d39",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2011-12-05T05:27:21Z",
    "title_canon_sha256": "1792b6fbe174fa780438edcc25171262411211b15d1bf23550bcab6c4bb40fa4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.0835",
    "kind": "arxiv",
    "version": 3
  }
}