Pith Number

pith:UKCRBEK2

pith:2009:UKCRBEK2G2RGVYK47FH35BZSLS

not attested not anchored not stored refs pending

An extension of the variational inequality approach for nonlinear ill-posed problems

Bernd Hofmann, Radu Ioan Bot

arxiv:0909.5093 v1 · 2009-09-28 · 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{UKCRBEK2G2RGVYK47FH35BZSLS}

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	2026-06-03T23:06:29.288059Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a28510915a36a26ae15cf94fbe87325cb3578b34844233409a56c337226967b5

Aliases

arxiv: 0909.5093 · arxiv_version: 0909.5093v1 · doi: 10.48550/arxiv.0909.5093 · pith_short_12: UKCRBEK2G2RG · pith_short_16: UKCRBEK2G2RGVYK4 · pith_short_8: UKCRBEK2

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/UKCRBEK2G2RGVYK47FH35BZSLS \
  | 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: a28510915a36a26ae15cf94fbe87325cb3578b34844233409a56c337226967b5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25350d0f417bed7173413cd46b2f4c59dfd7acbed53860771fb02a1952ef1b17",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-09-28T13:36:43Z",
    "title_canon_sha256": "76d909dc700ded1d0e6859346ef9b3012ac8987c0f233c20fa2c2439449abe27"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.5093",
    "kind": "arxiv",
    "version": 1
  }
}