Pith Number

pith:XG7KPE3X

pith:2018:XG7KPE3X64QOOHDNOLCEA5TSTL

not attested not anchored not stored refs pending

Regularization of ill-posed problems with non-negative solutions

Barbara Kaltenbacher, Christian Clason, Elena Resmerita

arxiv:1805.01722 v1 · 2018-05-04 · math.NA · 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{XG7KPE3X64QOOHDNOLCEA5TSTL}

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	2026-05-18T00:16:46.917943Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9bea79377f720e71c6d72c44076729add76922d12605c38277a7cd48cf974d0

Aliases

arxiv: 1805.01722 · arxiv_version: 1805.01722v1 · doi: 10.48550/arxiv.1805.01722 · pith_short_12: XG7KPE3X64QO · pith_short_16: XG7KPE3X64QOOHDN · pith_short_8: XG7KPE3X

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/XG7KPE3X64QOOHDNOLCEA5TSTL \
  | 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: b9bea79377f720e71c6d72c44076729add76922d12605c38277a7cd48cf974d0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "13fed3fd897d487577af1b4edb9ec784726023d7ef6948ce569cd729bb1543cd",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-05-04T11:48:10Z",
    "title_canon_sha256": "ebe89e7e79064992c03d82ffbd8d2b2a9c4ba6e16c35042024a8e1dca71e30aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.01722",
    "kind": "arxiv",
    "version": 1
  }
}