Pith Number

pith:UQJLPTA5

pith:2019:UQJLPTA5AAGFVGN3M5C6Z7IR7K

not attested not anchored not stored refs pending

A Convex Approach to Frisch-Kalman Problem

Anders Rantzer, Di Zhao, Li Qiu

arxiv:1909.03932 v1 · 2019-09-09 · math.OC · cs.SY · eess.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{UQJLPTA5AAGFVGN3M5C6Z7IR7K}

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	2026-07-05T00:03:09.922213Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a412b7cc1d000c5a99bb6745ecfd11fa9ae21604bbaed77108b08223dcbf0549

Aliases

arxiv: 1909.03932 · arxiv_version: 1909.03932v1 · doi: 10.48550/arxiv.1909.03932 · pith_short_12: UQJLPTA5AAGF · pith_short_16: UQJLPTA5AAGFVGN3 · pith_short_8: UQJLPTA5

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/UQJLPTA5AAGFVGN3M5C6Z7IR7K \
  | 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: a412b7cc1d000c5a99bb6745ecfd11fa9ae21604bbaed77108b08223dcbf0549

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1e9b5800e488d52553e79fecdd5054f5439616999eb1adfd90b88e9f19c27bf7",
    "cross_cats_sorted": [
      "cs.SY",
      "eess.SY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-09-09T15:31:01Z",
    "title_canon_sha256": "d08e978a36fa3946445a2f18726915095c0851ff20295175f8d0d3b701eeb757"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.03932",
    "kind": "arxiv",
    "version": 1
  }
}