Pith Number

pith:GRRMU2GY

pith:2017:GRRMU2GY6KGRPAP753VIM42VWD

not attested not anchored not stored refs pending

Identification and Estimation of Quantum Linear Input-Output Systems

Matthew Levitt, M\u{a}d\u{a}lin Gu\c{t}\u{a}, Theodore Kypraios

arxiv:1712.08531 v1 · 2017-12-22 · 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{GRRMU2GY6KGRPAP753VIM42VWD}

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	2026-05-18T00:27:23.141927Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3462ca68d8f28d1781ffeeea867355b0fe29978485c523fee8e4031ce5f915c7

Aliases

arxiv: 1712.08531 · arxiv_version: 1712.08531v1 · doi: 10.48550/arxiv.1712.08531 · pith_short_12: GRRMU2GY6KGR · pith_short_16: GRRMU2GY6KGRPAP7 · pith_short_8: GRRMU2GY

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/GRRMU2GY6KGRPAP753VIM42VWD \
  | 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: 3462ca68d8f28d1781ffeeea867355b0fe29978485c523fee8e4031ce5f915c7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8cea5fa6be9b33fe73ef3a4de82fdeded3f82ab910dfa5ec196c22b5976f170c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2017-12-22T15:46:58Z",
    "title_canon_sha256": "1c8b9733adccfd9bf66a1a7907882dd7037b5f0e8adbe7aee0806daf7361ab39"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.08531",
    "kind": "arxiv",
    "version": 1
  }
}