Pith Number

pith:BGDWFS5T

pith:2018:BGDWFS5TDR553GQ3II4VDTYQ5R

not attested not anchored not stored refs pending

Error Estimates for Arnoldo-Tikhonov Regularization for Ill-Posed Operator Equations

Lothar Reichel, Ronny Ramlau

arxiv:1812.01560 v1 · 2018-12-04 · math.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{BGDWFS5TDR553GQ3II4VDTYQ5R}

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	2026-05-17T23:59:10.488820Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

098762cbb31c7bdd9a1b423951cf10ec7e1da58d3595dea39423a34415d69a40

Aliases

arxiv: 1812.01560 · arxiv_version: 1812.01560v1 · doi: 10.48550/arxiv.1812.01560 · pith_short_12: BGDWFS5TDR55 · pith_short_16: BGDWFS5TDR553GQ3 · pith_short_8: BGDWFS5T

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/BGDWFS5TDR553GQ3II4VDTYQ5R \
  | 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: 098762cbb31c7bdd9a1b423951cf10ec7e1da58d3595dea39423a34415d69a40

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c65a221ad69ba18230701df2ff60cc2087eeaa5d9940d68551165c6d42bcd70",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-12-04T17:58:31Z",
    "title_canon_sha256": "90112a527b2f1099dd8f435ff7b8dc52c363d416827a099a46111083c68b7649"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.01560",
    "kind": "arxiv",
    "version": 1
  }
}