Pith Number

pith:7QXDMCB5

pith:2021:7QXDMCB5HMAHVCDV4DXI2S6VXT

not attested not anchored not stored refs pending

Orthonormal Filters for Identification in Active Control Systems

Dirk Mayer

arxiv:2104.11098 v1 · 2021-04-22 · 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{7QXDMCB5HMAHVCDV4DXI2S6VXT}

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	2026-07-05T02:34:17.628336Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc2e36083d3b007a8875e0ee8d4bd5bce966665718e7ded1bf3494515f9bdd63

Aliases

arxiv: 2104.11098 · arxiv_version: 2104.11098v1 · doi: 10.48550/arxiv.2104.11098 · pith_short_12: 7QXDMCB5HMAH · pith_short_16: 7QXDMCB5HMAHVCDV · pith_short_8: 7QXDMCB5

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/7QXDMCB5HMAHVCDV4DXI2S6VXT \
  | 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: fc2e36083d3b007a8875e0ee8d4bd5bce966665718e7ded1bf3494515f9bdd63

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "342b736d33686ff02d3a4159f89651bcfc7037f942479edecaa16870c628ed44",
    "cross_cats_sorted": [
      "cs.SY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SY",
    "submitted_at": "2021-04-22T14:34:33Z",
    "title_canon_sha256": "c126e1cfe59399d895561a8d32b0650e5635802fa2e16dbe2311cdc2c2d8a707"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.11098",
    "kind": "arxiv",
    "version": 1
  }
}