Pith Number

pith:DTVLAD2I

pith:2012:DTVLAD2IGKV2NFZMAGCNF2BF2N

not attested not anchored not stored refs pending

The Circulant Rational Covariance Extension Problem: The Complete Solution

Anders Lindquist, Giorgio Picci

arxiv:1208.6286 v1 · 2012-08-30 · 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{DTVLAD2IGKV2NFZMAGCNF2BF2N}

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	2026-05-18T03:46:45.997967Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1ceab00f4832aba6972c0184d2e825d3581374073c84a5fbde8a30ee94e3c386

Aliases

arxiv: 1208.6286 · arxiv_version: 1208.6286v1 · doi: 10.48550/arxiv.1208.6286 · pith_short_12: DTVLAD2IGKV2 · pith_short_16: DTVLAD2IGKV2NFZM · pith_short_8: DTVLAD2I

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/DTVLAD2IGKV2NFZMAGCNF2BF2N \
  | 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: 1ceab00f4832aba6972c0184d2e825d3581374073c84a5fbde8a30ee94e3c386

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d24787ba4759641e3d7b7c0feba3cd10566ebb1fe43d6f1a569af343954bac38",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-08-30T19:57:49Z",
    "title_canon_sha256": "e78b30e575d3e50737ae1c7df8b5b2723df947688ef7e21590e8a0c4338849a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.6286",
    "kind": "arxiv",
    "version": 1
  }
}