Pith Number

pith:YUS6V62J

pith:2026:YUS6V62JKP3GZ3EASEI3QF6AHG

not attested not anchored not stored refs pending

QVaR: a Quantum Variational Regularization method for Linear Inverse Problems

Andreas Hauptmann, Babak Maboudi Afkham, Hj{\o}rdis Schl\"uter, Siiri Rautio

arxiv:2606.21392 v1 · 2026-06-19 · math.NA · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YUS6V62JKP3GZ3EASEI3QF6AHG}

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	2026-06-23T01:13:08.803831Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c525eafb4953f66cec809111b817c0398c2af0e74a108b77ca3fc8540b00ecf9

Aliases

arxiv: 2606.21392 · arxiv_version: 2606.21392v1 · doi: 10.48550/arxiv.2606.21392 · pith_short_12: YUS6V62JKP3G · pith_short_16: YUS6V62JKP3GZ3EA · pith_short_8: YUS6V62J

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/YUS6V62JKP3GZ3EASEI3QF6AHG \
  | 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: c525eafb4953f66cec809111b817c0398c2af0e74a108b77ca3fc8540b00ecf9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6259dd0fdaa4127a908db689e8528bdfbac26dfe4b405ab846198107554bbb9d",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-06-19T12:55:06Z",
    "title_canon_sha256": "e1738883434af866259a0c9b32bc58738400f666c0c8644adafbf9cedbf1fda8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.21392",
    "kind": "arxiv",
    "version": 1
  }
}