Pith Number

pith:P6KPGPPW

pith:2012:P6KPGPPWNQPNEA6VPTTXYODXWJ

not attested not anchored not stored refs pending

Nonconvex notions of regularity and convergence of fundamental algorithms for feasibility problems

D. Russell Luke, Robert Hesse

arxiv:1212.3349 v2 · 2012-12-13 · math.OC · 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{P6KPGPPWNQPNEA6VPTTXYODXWJ}

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	2026-05-18T02:56:21.384140Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f94f33df66c1ed203d57ce77c3877b277ddfc365e91ec793fe255ca04d4be31

Aliases

arxiv: 1212.3349 · arxiv_version: 1212.3349v2 · doi: 10.48550/arxiv.1212.3349 · pith_short_12: P6KPGPPWNQPN · pith_short_16: P6KPGPPWNQPNEA6V · pith_short_8: P6KPGPPW

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/P6KPGPPWNQPNEA6VPTTXYODXWJ \
  | 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: 7f94f33df66c1ed203d57ce77c3877b277ddfc365e91ec793fe255ca04d4be31

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd9140b26aa7f5922d475d54fcf8b46283211f04aab6b35e5dd4ec6cfde6e1ce",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-12-13T21:52:36Z",
    "title_canon_sha256": "d27651b61c1f8765433170d8a2c1b6214ad8d9982357c4cb7e5142083276feb3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.3349",
    "kind": "arxiv",
    "version": 2
  }
}