Pith Number

pith:QROKF5ZO

pith:2021:QROKF5ZOFMPJRUHSEOGOBI7YP5

not attested not anchored not stored refs pending

Approximating optimal feedback controllers of finite horizon control problems using hierarchical tensor formats

Leon Sallandt, Mathias Oster, Reinhold Schneider

arxiv:2104.06108 v1 · 2021-04-13 · math.OC · cs.NA · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QROKF5ZOFMPJRUHSEOGOBI7YP5}

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	2026-07-05T02:31:28.900755Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

845ca2f72e2b1e98d0f2238ce0a3f87f7c4f9eb261130e1f580f4a1696306d81

Aliases

arxiv: 2104.06108 · arxiv_version: 2104.06108v1 · doi: 10.48550/arxiv.2104.06108 · pith_short_12: QROKF5ZOFMPJ · pith_short_16: QROKF5ZOFMPJRUHS · pith_short_8: QROKF5ZO

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/QROKF5ZOFMPJRUHSEOGOBI7YP5 \
  | 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: 845ca2f72e2b1e98d0f2238ce0a3f87f7c4f9eb261130e1f580f4a1696306d81

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab2996277dabc8b990e4b8e77a955732b7e09c5104a35e1acd9e580218ce46c4",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2021-04-13T11:29:02Z",
    "title_canon_sha256": "9358b5ca4d3013cea03eaf07fa1a019ee30c395b4dc4be044f6c9ab4c848ef34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.06108",
    "kind": "arxiv",
    "version": 1
  }
}