Pith Number

pith:7RNHZ6IF

pith:2018:7RNHZ6IFD3J232IOLQBTD6SM7G

not attested not anchored not stored refs pending

Maximum determinant positive definite Toeplitz completions

Henry Wolkowicz, Hugo J. Woerdeman, Stefan Sremac

arxiv:1802.00653 v1 · 2018-02-02 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7RNHZ6IFD3J232IOLQBTD6SM7G}

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	2026-05-18T00:24:32.679893Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc5a7cf9051ed3ade90e5c0331fa4cf9aa150adcb0c72116ab1d456d48a95fc0

Aliases

arxiv: 1802.00653 · arxiv_version: 1802.00653v1 · doi: 10.48550/arxiv.1802.00653 · pith_short_12: 7RNHZ6IFD3J2 · pith_short_16: 7RNHZ6IFD3J232IO · pith_short_8: 7RNHZ6IF

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/7RNHZ6IFD3J232IOLQBTD6SM7G \
  | 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: fc5a7cf9051ed3ade90e5c0331fa4cf9aa150adcb0c72116ab1d456d48a95fc0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "76d519f24352886c752559cfcb07cb614c2f2996971120542d7f45eca03a73c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-02-02T12:08:51Z",
    "title_canon_sha256": "f8ca37a847bb3f25f2f66ea67d3ea5840d7f3018f61e1abbccba89baabb5a59a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.00653",
    "kind": "arxiv",
    "version": 1
  }
}