Pith Number

pith:JEOR3HUI

pith:2009:JEOR3HUIM3UBRQRJQFNEJIIUK4

not attested not anchored not stored refs pending

Iterative thresholding meets free discontinuity problems

Massimo Fornasier, Rachel Ward

arxiv:0901.2605 v2 · 2009-01-17 · math.NA · cs.NA · math.FA · 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{JEOR3HUIM3UBRQRJQFNEJIIUK4}

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	2026-06-03T23:06:10.456883Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

491d1d9e8866e818c229815a44a114573033a9b451562817bba36eb442c92c24

Aliases

arxiv: 0901.2605 · arxiv_version: 0901.2605v2 · doi: 10.48550/arxiv.0901.2605 · pith_short_12: JEOR3HUIM3UB · pith_short_16: JEOR3HUIM3UBRQRJ · pith_short_8: JEOR3HUI

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/JEOR3HUIM3UBRQRJQFNEJIIUK4 \
  | 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: 491d1d9e8866e818c229815a44a114573033a9b451562817bba36eb442c92c24

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ab43cbf23ef23592547749bde2767ab0dea5ac373ba59ca80af46acad99338c",
    "cross_cats_sorted": [
      "cs.NA",
      "math.FA",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-01-17T01:42:41Z",
    "title_canon_sha256": "b57b61cf1ce08698264810a6bc756fb456e1d7c7a184df4d7f66355c1184ccf8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2605",
    "kind": "arxiv",
    "version": 2
  }
}