Pith Number

pith:QNWLQWA7

pith:2014:QNWLQWA7LXPYVNQP2NKVH2RWGX

not attested not anchored not stored refs pending

Partial facial reduction: simplified, equivalent SDPs via approximations of the PSD cone

Frank Permenter, Pablo Parrilo

arxiv:1408.4685 v3 · 2014-08-20 · 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{QNWLQWA7LXPYVNQP2NKVH2RWGX}

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	2026-05-18T00:29:21.488534Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

836cb8581f5ddf8ab60fd35553ea3635d6150f08347a4a6edb8ffc49e0db16d1

Aliases

arxiv: 1408.4685 · arxiv_version: 1408.4685v3 · doi: 10.48550/arxiv.1408.4685 · pith_short_12: QNWLQWA7LXPY · pith_short_16: QNWLQWA7LXPYVNQP · pith_short_8: QNWLQWA7

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/QNWLQWA7LXPYVNQP2NKVH2RWGX \
  | 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: 836cb8581f5ddf8ab60fd35553ea3635d6150f08347a4a6edb8ffc49e0db16d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4af9824ee3a92e05f80b38dd514650b22b4eadba3d8891dfa42de0c16c8e3593",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2014-08-20T15:00:36Z",
    "title_canon_sha256": "50235e395337b39e4ed8253a0ac459039f7cebee67ea5b143670cfebfeb710f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.4685",
    "kind": "arxiv",
    "version": 3
  }
}