Pith Number

pith:O66G2M3E

pith:2019:O66G2M3EASJFOQXSWBNSGBCB5P

not attested not anchored not stored refs pending

Nonlinear Observability via Koopman Analysis: Characterizing the Role of Symmetry

Afshin Mesbahi, Jingjing Bu, Mehran Mesbahi

arxiv:1904.08449 v3 · 2019-04-17 · eess.SY · cs.SY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O66G2M3EASJFOQXSWBNSGBCB5P}

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	2026-06-04T20:14:25.937003Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77bc6d336404925742f2b05b230441ebdb306cdfb8a9cf3b9cfa8aa86c5b704f

Aliases

arxiv: 1904.08449 · arxiv_version: 1904.08449v3 · doi: 10.48550/arxiv.1904.08449 · pith_short_12: O66G2M3EASJF · pith_short_16: O66G2M3EASJFOQXS · pith_short_8: O66G2M3E

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/O66G2M3EASJFOQXSWBNSGBCB5P \
  | 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: 77bc6d336404925742f2b05b230441ebdb306cdfb8a9cf3b9cfa8aa86c5b704f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "461073e2bca344b3428ec898a98df2dcd34db49c1699d06e78a0ae5d57a8e150",
    "cross_cats_sorted": [
      "cs.SY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SY",
    "submitted_at": "2019-04-17T18:46:33Z",
    "title_canon_sha256": "efe36d95ef5c14a18a145c6cd8ab11e84314017c6faec1e134470cdcc06df43b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.08449",
    "kind": "arxiv",
    "version": 3
  }
}