Pith Number

pith:7SDLPG7I

pith:2021:7SDLPG7IEC5WGPA6U76JKLT6A4

not attested not anchored not stored refs pending

Solving graph equipartition SDPs on an algebraic variety

Kim-Chuan Toh, Tianyun Tang

arxiv:2112.04256 v2 · 2021-12-08 · 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{7SDLPG7IEC5WGPA6U76JKLT6A4}

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	2026-07-05T04:45:37.279630Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc86b79be820bb633c1ea7fc952e7e072bd57db14881d65295aa291f35b5a2a2

Aliases

arxiv: 2112.04256 · arxiv_version: 2112.04256v2 · doi: 10.48550/arxiv.2112.04256 · pith_short_12: 7SDLPG7IEC5W · pith_short_16: 7SDLPG7IEC5WGPA6 · pith_short_8: 7SDLPG7I

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/7SDLPG7IEC5WGPA6U76JKLT6A4 \
  | 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: fc86b79be820bb633c1ea7fc952e7e072bd57db14881d65295aa291f35b5a2a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee1a569e6c4b5292496ecd8f19247992cecdcb541b2d17baf375d6fc21d56cc6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2021-12-08T12:30:15Z",
    "title_canon_sha256": "1e193c75a40c0e1e18ae11640ef2d2a4fad2e6e0408d7e0fd7a2a53054206818"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.04256",
    "kind": "arxiv",
    "version": 2
  }
}