Pith Number

pith:QJTJL543

pith:2017:QJTJL543ODEH6HCAG6O7D2MZHI

not attested not anchored not stored refs pending

Finding the nearest positive-real system

Nicolas Gillis, Punit Sharma

arxiv:1707.00530 v2 · 2017-07-03 · math.OC · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QJTJL543ODEH6HCAG6O7D2MZHI}

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	2026-05-18T00:18:09.613732Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

826695f79b70c87f1c40379df1e9993a2f856c1167ad7ece2c396d98462cdf11

Aliases

arxiv: 1707.00530 · arxiv_version: 1707.00530v2 · doi: 10.48550/arxiv.1707.00530 · pith_short_12: QJTJL543ODEH · pith_short_16: QJTJL543ODEH6HCA · pith_short_8: QJTJL543

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/QJTJL543ODEH6HCAG6O7D2MZHI \
  | 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: 826695f79b70c87f1c40379df1e9993a2f856c1167ad7ece2c396d98462cdf11

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "85dee81c96e678b2e2f066b60644477dbfb61c3fb21565d17f46c2208b66807b",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-07-03T13:19:08Z",
    "title_canon_sha256": "c3294ae54e4eff799a3cf68c8867d5446e3aad0dc5e67e7b3ebbe22117080c6e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.00530",
    "kind": "arxiv",
    "version": 2
  }
}