Pith Number

pith:GKDUVK3I

pith:2018:GKDUVK3IUHTLVDQ5AVCTLSKZCW

not attested not anchored not stored refs pending

A Bilevel Approach for Parameter Learning in Inverse Problems

Gernot Holler, Karl Kunisch, Richard C. Barnard

arxiv:1802.01365 v1 · 2018-02-05 · 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{GKDUVK3IUHTLVDQ5AVCTLSKZCW}

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	2026-05-17T23:59:17.672502Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32874aab68a1e6ba8e1d054535c959158607d73bfde57fc808ffc9c591323c3b

Aliases

arxiv: 1802.01365 · arxiv_version: 1802.01365v1 · doi: 10.48550/arxiv.1802.01365 · pith_short_12: GKDUVK3IUHTL · pith_short_16: GKDUVK3IUHTLVDQ5 · pith_short_8: GKDUVK3I

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/GKDUVK3IUHTLVDQ5AVCTLSKZCW \
  | 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: 32874aab68a1e6ba8e1d054535c959158607d73bfde57fc808ffc9c591323c3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e314cc90fb4335a2cc4288cb9afbe10b6eaf372f3ed29c6b3bad9093dca6f4a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-02-05T12:27:44Z",
    "title_canon_sha256": "4cadab2e822d4f1a3d69177d9f116e2c4bbbbe8f64847eefc84d0a252bc8c76d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.01365",
    "kind": "arxiv",
    "version": 1
  }
}