Pith Number

pith:OFHEGYYJ

pith:2017:OFHEGYYJ3TPWL5VX3F57G6IWLC

not attested not anchored not stored refs pending

A spectrahedral representation of the first derivative relaxation of the positive semidefinite cone

James Saunderson

arxiv:1707.09150 v2 · 2017-07-28 · 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{OFHEGYYJ3TPWL5VX3F57G6IWLC}

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	2026-05-18T00:20:56.337975Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

714e436309dcdf65f6b7d97bf3791658a256b304c299b770f9e2e62490bbe1d5

Aliases

arxiv: 1707.09150 · arxiv_version: 1707.09150v2 · doi: 10.48550/arxiv.1707.09150 · pith_short_12: OFHEGYYJ3TPW · pith_short_16: OFHEGYYJ3TPWL5VX · pith_short_8: OFHEGYYJ

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/OFHEGYYJ3TPWL5VX3F57G6IWLC \
  | 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: 714e436309dcdf65f6b7d97bf3791658a256b304c299b770f9e2e62490bbe1d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc889d948497504265847a12467c28a0058175988ef2de73928778175431772a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-07-28T08:40:59Z",
    "title_canon_sha256": "46c22f123b743a7393d9b8a70a128e886ec7f0d6b51d7f66c3f1986c5a6d4d9f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.09150",
    "kind": "arxiv",
    "version": 2
  }
}