Pith Number

pith:256BMV6Y

pith:2018:256BMV6YKFYO3277OIXWM2RDR3

not attested not anchored not stored refs pending

The Geometry of SDP-Exactness in Quadratic Optimization

Bernd Sturmfels, Corey Harris, Diego Cifuentes

arxiv:1804.01796 v2 · 2018-04-05 · math.OC · cs.SC · math.AG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{256BMV6YKFYO3277OIXWM2RDR3}

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	2026-05-17T23:56:53.498015Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d77c1657d85170edebff722f666a238ec16d98e54b3d4e211906f29af3af1dfa

Aliases

arxiv: 1804.01796 · arxiv_version: 1804.01796v2 · doi: 10.48550/arxiv.1804.01796 · pith_short_12: 256BMV6YKFYO · pith_short_16: 256BMV6YKFYO3277 · pith_short_8: 256BMV6Y

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/256BMV6YKFYO3277OIXWM2RDR3 \
  | 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: d77c1657d85170edebff722f666a238ec16d98e54b3d4e211906f29af3af1dfa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b055c8a637b910f1c5f93833ed6cb4176b52cc255d329916f8bed7628880550",
    "cross_cats_sorted": [
      "cs.SC",
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-04-05T12:02:53Z",
    "title_canon_sha256": "b6bab2dffc5ffbd3194f34e1fc9c6f4d1d7c79f71ec0d8f736775cd59974a591"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.01796",
    "kind": "arxiv",
    "version": 2
  }
}