Pith Number

pith:BRI27QZE

pith:2019:BRI27QZECG6EHGST7F7YV3MCRE

not attested not anchored not stored refs pending

Quantum Tomography by Regularized Linear Regression

Biqiang Mu, Guodong Shi, Hongsheng Qi, Ian R. Petersen

arxiv:1904.11839 v1 · 2019-04-26 · quant-ph · 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{BRI27QZECG6EHGST7F7YV3MCRE}

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	2026-05-17T23:47:40.818302Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c51afc32411bc439a53f97f8aed828939b5c2fe7517efc46a5152eba57d9d1a

Aliases

arxiv: 1904.11839 · arxiv_version: 1904.11839v1 · doi: 10.48550/arxiv.1904.11839 · pith_short_12: BRI27QZECG6E · pith_short_16: BRI27QZECG6EHGST · pith_short_8: BRI27QZE

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/BRI27QZECG6EHGST7F7YV3MCRE \
  | 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: 0c51afc32411bc439a53f97f8aed828939b5c2fe7517efc46a5152eba57d9d1a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c2ca151fbaa4739f83b1d112d1ae4d6496d5a641e02cbe9c68caf041ed2b4a4",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-04-26T13:35:03Z",
    "title_canon_sha256": "73636d408579e1b40de418e8e5a7e19e6f0acf536c500bb3ff098921b7473f37"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.11839",
    "kind": "arxiv",
    "version": 1
  }
}