Pith Number

pith:NHJB6LEE

pith:2019:NHJB6LEE6SOMG46J3FI2DJSJUY

not attested not anchored not stored refs pending

Improved PDE Models for Image Restoration through Backpropagation

Diogo Lobo, S\'ilvia Barbeiro

arxiv:1907.05132 v1 · 2019-07-11 · 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{NHJB6LEE6SOMG46J3FI2DJSJUY}

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	2026-05-17T23:40:53.868493Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69d21f2c84f49cc373c9d951a1a649a62744e268d15e1f2fc1d9bb7483c4e8d8

Aliases

arxiv: 1907.05132 · arxiv_version: 1907.05132v1 · doi: 10.48550/arxiv.1907.05132 · pith_short_12: NHJB6LEE6SOM · pith_short_16: NHJB6LEE6SOMG46J · pith_short_8: NHJB6LEE

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/NHJB6LEE6SOMG46J3FI2DJSJUY \
  | 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: 69d21f2c84f49cc373c9d951a1a649a62744e268d15e1f2fc1d9bb7483c4e8d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32adad0c7cd75e7e700c281abbe77bf1b2861d34b886a6a1fa478174f363670e",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-07-11T12:05:43Z",
    "title_canon_sha256": "b1f4bc7c9ff8218eba33312d6af240bea91697d551f885a7c1b585543653f991"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.05132",
    "kind": "arxiv",
    "version": 1
  }
}