Pith Number

pith:VBYJZ4ED

pith:2019:VBYJZ4EDB3WZZUILFZLWSXGS6X

not attested not anchored not stored refs pending

A Geometrical Analysis of a Class of Nonconvex Conic Programs for Convex Conic Reformulations of Quadratic and Polynomial Optimization Problems

Kim-Chuan Toh, Masakazu Kojima, Sunyoung Kim

arxiv:1901.02179 v1 · 2019-01-08 · 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{VBYJZ4EDB3WZZUILFZLWSXGS6X}

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	2026-05-17T23:56:43.852970Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8709cf0830eed9cd10b2e57695cd2f5cc31bb8a0f1d8dcc03c0e2749ace8402

Aliases

arxiv: 1901.02179 · arxiv_version: 1901.02179v1 · doi: 10.48550/arxiv.1901.02179 · pith_short_12: VBYJZ4EDB3WZ · pith_short_16: VBYJZ4EDB3WZZUIL · pith_short_8: VBYJZ4ED

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/VBYJZ4EDB3WZZUILFZLWSXGS6X \
  | 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: a8709cf0830eed9cd10b2e57695cd2f5cc31bb8a0f1d8dcc03c0e2749ace8402

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c0df129f18878cbe96ef80f595467ec4e4f3b2e04cc87e790982da752a5ec384",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-01-08T07:11:10Z",
    "title_canon_sha256": "5ea6585d4f8b009a5fd957bd8d1d05e4cbca1bebeea4b96272676a0ebdc25895"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.02179",
    "kind": "arxiv",
    "version": 1
  }
}