Pith Number

pith:Q7WKRLDN

pith:2009:Q7WKRLDNYHIJ43ROIQUED73FJ7

not attested not anchored not stored refs pending

Semidefinite programs for completely bounded norms

John Watrous

arxiv:0901.4709 v2 · 2009-01-29 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q7WKRLDNYHIJ43ROIQUED73FJ7}

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.

Cited by

1 paper in Pith

A Unified Blockwise Measurement Design for Learning Quantum Channels and Lindbladians via Low-Rank Matrix Sensing

Receipt and verification

First computed	2026-07-04T15:41:08.635888Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

87eca8ac6dc1d09e6e2e442841ff654fd577ff0c0a59df945316884a45b34d64

Aliases

arxiv: 0901.4709 · arxiv_version: 0901.4709v2 · doi: 10.48550/arxiv.0901.4709 · pith_short_12: Q7WKRLDNYHIJ · pith_short_16: Q7WKRLDNYHIJ43RO · pith_short_8: Q7WKRLDN

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/Q7WKRLDNYHIJ43ROIQUED73FJ7 \
  | 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: 87eca8ac6dc1d09e6e2e442841ff654fd577ff0c0a59df945316884a45b34d64

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "47f09191b0d3fba5ad8186fcfbbfe5e2e10f745c1ef11b0f05f408231c3c657c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-01-29T15:53:13Z",
    "title_canon_sha256": "a03c57dedc441fafcb67ea85405561bc18e76a14414997b9013fab8da1c840c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4709",
    "kind": "arxiv",
    "version": 2
  }
}