Pith Number

pith:DMDGUYDG

pith:2019:DMDGUYDG2A5IO463RDZW3HCWPZ

not attested not anchored not stored refs pending

A flexible space-variant anisotropic regularisation for image restoration with automated parameter selection

Alessandro Lanza, Fiorella Sgallari, Luca Calatroni, Monica Pragliola

arxiv:1904.01799 v1 · 2019-04-03 · 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{DMDGUYDG2A5IO463RDZW3HCWPZ}

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	2026-05-17T23:49:29.631402Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b066a6066d03a8773db88f36d9c567e7a331f35ab4579d6e62534d7961b32ce

Aliases

arxiv: 1904.01799 · arxiv_version: 1904.01799v1 · doi: 10.48550/arxiv.1904.01799 · pith_short_12: DMDGUYDG2A5I · pith_short_16: DMDGUYDG2A5IO463 · pith_short_8: DMDGUYDG

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/DMDGUYDG2A5IO463RDZW3HCWPZ \
  | 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: 1b066a6066d03a8773db88f36d9c567e7a331f35ab4579d6e62534d7961b32ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "feca502c489743adc30f7461dcfe7f231bfa0d3871d159d5beaee4974a80bb41",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-04-03T06:50:05Z",
    "title_canon_sha256": "1e6436f2d242106269c93a0f281f19c16ee27f8e620ae75792eabe4815433b82"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.01799",
    "kind": "arxiv",
    "version": 1
  }
}