Pith Number

pith:3MCHXW5R

pith:2018:3MCHXW5RNHOH3Q2EK6NEU2JQJ4

not attested not anchored not stored refs pending

A comparative study of structural similarity and regularization for joint inverse problems governed by PDEs

Benjamin Crestel, Georg Stadler, Omar Ghattas

arxiv:1808.05441 v1 · 2018-08-16 · math.NA · math.OC · stat.ME

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3MCHXW5RNHOH3Q2EK6NEU2JQJ4}

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	2026-05-17T23:55:12.078673Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db047bdbb169dc7dc344579a4a69304f046664ae78c46b95c6d435e74141bfcc

Aliases

arxiv: 1808.05441 · arxiv_version: 1808.05441v1 · doi: 10.48550/arxiv.1808.05441 · pith_short_12: 3MCHXW5RNHOH · pith_short_16: 3MCHXW5RNHOH3Q2E · pith_short_8: 3MCHXW5R

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/3MCHXW5RNHOH3Q2EK6NEU2JQJ4 \
  | 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: db047bdbb169dc7dc344579a4a69304f046664ae78c46b95c6d435e74141bfcc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5518f79732c3ac690c3e6c7791786ed64158e8da5a7111b0d40bcd2956463a5",
    "cross_cats_sorted": [
      "math.OC",
      "stat.ME"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-08-16T12:20:49Z",
    "title_canon_sha256": "0032910068d59f140dfe47e94b868e1f93a41371d7fe9a5f411d02c2d3f11953"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.05441",
    "kind": "arxiv",
    "version": 1
  }
}