Pith Number

pith:KBCUVJSF

pith:2015:KBCUVJSF27C6B4ONLT4TCX7DE4

not attested not anchored not stored refs pending

Certificates of infeasibility via nonsmooth optimization

Arnold Neumaier, Hannes Fendl, Hermann Schichl

arxiv:1506.08338 v1 · 2015-06-27 · 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{KBCUVJSF27C6B4ONLT4TCX7DE4}

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	2026-05-18T01:37:46.763279Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

50454aa645d7c5e0f1cd5cf9315fe3273f3d2dc7d6b2be6ca22d259edb751e56

Aliases

arxiv: 1506.08338 · arxiv_version: 1506.08338v1 · doi: 10.48550/arxiv.1506.08338 · pith_short_12: KBCUVJSF27C6 · pith_short_16: KBCUVJSF27C6B4ON · pith_short_8: KBCUVJSF

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/KBCUVJSF27C6B4ONLT4TCX7DE4 \
  | 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: 50454aa645d7c5e0f1cd5cf9315fe3273f3d2dc7d6b2be6ca22d259edb751e56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba45961d1b9df59e793f6d8c1124f725b897ac1118004a9822aa5887db891102",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-06-27T23:54:40Z",
    "title_canon_sha256": "51d469baf49bc09e56856e0a8ae9c26c6d0601dbb4356d1ec7d6c5ff7a2d0068"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.08338",
    "kind": "arxiv",
    "version": 1
  }
}