Pith Number

pith:AR64E2DT

pith:2016:AR64E2DTO7GXC76D5F6RLS43NU

not attested not anchored not stored refs pending

Shape optimisation with nonsmooth cost functions: from theory to numerics

Kevin Sturm

arxiv:1603.08235 v2 · 2016-03-27 · 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{AR64E2DTO7GXC76D5F6RLS43NU}

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	2026-05-18T01:17:49.867279Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

047dc2687377cd717fc3e97d15cb9b6d176e5ed6578b748bec1b54faff19848b

Aliases

arxiv: 1603.08235 · arxiv_version: 1603.08235v2 · doi: 10.48550/arxiv.1603.08235 · pith_short_12: AR64E2DTO7GX · pith_short_16: AR64E2DTO7GXC76D · pith_short_8: AR64E2DT

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/AR64E2DTO7GXC76D5F6RLS43NU \
  | 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: 047dc2687377cd717fc3e97d15cb9b6d176e5ed6578b748bec1b54faff19848b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4befebf18a1c9100ac197ab499a30371cfc8dc259d977491670c8b13f837cfef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2016-03-27T16:38:48Z",
    "title_canon_sha256": "c775de4584dcee713df0daae7d876bd741e7323d7bf3d77baaf97c3a03e364b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.08235",
    "kind": "arxiv",
    "version": 2
  }
}