Pith Number

pith:XTLOCQQD

pith:2014:XTLOCQQD4YN3SDZFP37FMWQN33

not attested not anchored not stored refs pending

Convergence of Nonlinear Observers on R^n with a Riemannian Metric (Part I)

Laurent Praly, Ricardo G. Sanfelice

arxiv:1412.6730 v2 · 2014-12-21 · math.OC · cs.SY · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XTLOCQQD4YN3SDZFP37FMWQN33}

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	2026-05-18T01:36:51.475730Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bcd6e14203e61bb90f257efe565a0dded000ad8cc5cb087614fca16ab8c7d8e3

Aliases

arxiv: 1412.6730 · arxiv_version: 1412.6730v2 · doi: 10.48550/arxiv.1412.6730 · pith_short_12: XTLOCQQD4YN3 · pith_short_16: XTLOCQQD4YN3SDZF · pith_short_8: XTLOCQQD

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/XTLOCQQD4YN3SDZFP37FMWQN33 \
  | 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: bcd6e14203e61bb90f257efe565a0dded000ad8cc5cb087614fca16ab8c7d8e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0bd8de639b03e3b626cbfa23446087b59223c6c7b92a184865c2d334570477b8",
    "cross_cats_sorted": [
      "cs.SY",
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2014-12-21T06:25:29Z",
    "title_canon_sha256": "4b5b63e6631e1b52ade3944f35b91d47386ed2b3229269f22249755ce66ec96d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.6730",
    "kind": "arxiv",
    "version": 2
  }
}