Pith Number

pith:GXVVR4I7

pith:2021:GXVVR4I7YORL64TJIUJTNAK4R3

not attested not anchored not stored refs pending

Training variational quantum algorithms is NP-hard

Lennart Bittel, Martin Kliesch

arxiv:2101.07267 v2 · 2021-01-18 · 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{GXVVR4I7YORL64TJIUJTNAK4R3}

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

2 papers in Pith

Weak Poincar\'e Inequalities via Approximate Stochastic Localization: Application to Sampling the Sherrington-Kirkpatrick Model

An Operational Framework for Nonclassicality in Quantum Communication Networks

Receipt and verification

First computed	2026-07-05T04:14:36.584234Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

35eb58f11fc3a2bf7269451336815c8ee88c3f8f049242a556c53d192129fa0d

Aliases

arxiv: 2101.07267 · arxiv_version: 2101.07267v2 · doi: 10.48550/arxiv.2101.07267 · pith_short_12: GXVVR4I7YORL · pith_short_16: GXVVR4I7YORL64TJ · pith_short_8: GXVVR4I7

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/GXVVR4I7YORL64TJIUJTNAK4R3 \
  | 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: 35eb58f11fc3a2bf7269451336815c8ee88c3f8f049242a556c53d192129fa0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ebebdb87d26c4822670a24126f3ea0b188b10e83df9cfbd2c1b16e76c7ca45b9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2021-01-18T19:00:01Z",
    "title_canon_sha256": "6ea4fb43f54d138ec00c9ccc715a3851577625925290df9f752fd8ab1a189b40"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.07267",
    "kind": "arxiv",
    "version": 2
  }
}