Pith Number

pith:XQ5VKNS7

pith:2015:XQ5VKNS7YNJYYICX6WJWRILLMK

not attested not anchored not stored refs pending

Regularization with Sparse Vector Fields: From Image Compression to TV-type Reconstruction

Eva-Maria Brinkmann, Joana Grah, Martin Burger

arxiv:1503.02044 v1 · 2015-03-03 · 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{XQ5VKNS7YNJYYICX6WJWRILLMK}

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	2026-05-18T02:25:26.993203Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc3b55365fc3538c2057f59368a16b62b98e21ce13537c8375d5e8fc2d0d8c67

Aliases

arxiv: 1503.02044 · arxiv_version: 1503.02044v1 · doi: 10.48550/arxiv.1503.02044 · pith_short_12: XQ5VKNS7YNJY · pith_short_16: XQ5VKNS7YNJYYICX · pith_short_8: XQ5VKNS7

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/XQ5VKNS7YNJYYICX6WJWRILLMK \
  | 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: bc3b55365fc3538c2057f59368a16b62b98e21ce13537c8375d5e8fc2d0d8c67

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ee6d54d7909dfd97717c7400eadb7d7795c73efb5fde7cd29aa16273e28f3be",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-03-03T23:32:22Z",
    "title_canon_sha256": "aa195092b84701646313b176094464e2a05f55864e5cf4e66d13ab225868dce7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.02044",
    "kind": "arxiv",
    "version": 1
  }
}