Pith Number

pith:3QIUHZQQ

pith:2018:3QIUHZQQ4BUMTTFNOWDKPIBPG7

not attested not anchored not stored refs pending

Abstract convex approximations of nonsmooth functions

M.V. Dolgopolik

arxiv:1810.00979 v1 · 2018-10-01 · 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{3QIUHZQQ4BUMTTFNOWDKPIBPG7}

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	2026-05-18T00:04:19.374387Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc1143e610e068c9ccad7586a7a02f37cc740da3203eb28745b8e6ff0dabc55b

Aliases

arxiv: 1810.00979 · arxiv_version: 1810.00979v1 · doi: 10.48550/arxiv.1810.00979 · pith_short_12: 3QIUHZQQ4BUM · pith_short_16: 3QIUHZQQ4BUMTTFN · pith_short_8: 3QIUHZQQ

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/3QIUHZQQ4BUMTTFNOWDKPIBPG7 \
  | 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: dc1143e610e068c9ccad7586a7a02f37cc740da3203eb28745b8e6ff0dabc55b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a1f1036f089de1774a46399aba0bf14d29c15312db0c17a11f1c21c70679a70",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-10-01T21:03:53Z",
    "title_canon_sha256": "e0c3b6ac3aa0984be7275062f9d2f9dfeca818f2c1402b4cc559b9e7ed50a038"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.00979",
    "kind": "arxiv",
    "version": 1
  }
}