Pith Number

pith:2KAQIAZX

pith:2015:2KAQIAZX6NAGQ5A5JCJ2SLAZE2

not attested not anchored not stored refs pending

A Port-Hamiltonian Approach to Optimal Frequency Regulation in Power Grids

Arjan van der Schaft, Claudio De Persis, Tjerk Stegink

arxiv:1509.07318 v1 · 2015-09-24 · 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{2KAQIAZX6NAGQ5A5JCJ2SLAZE2}

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	2026-05-18T01:32:09.324942Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d281040337f34068741d4893a92c1926b12eb10494901eee957a8c7f5ce4d767

Aliases

arxiv: 1509.07318 · arxiv_version: 1509.07318v1 · doi: 10.48550/arxiv.1509.07318 · pith_short_12: 2KAQIAZX6NAG · pith_short_16: 2KAQIAZX6NAGQ5A5 · pith_short_8: 2KAQIAZX

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/2KAQIAZX6NAGQ5A5JCJ2SLAZE2 \
  | 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: d281040337f34068741d4893a92c1926b12eb10494901eee957a8c7f5ce4d767

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6206b2afab57e93b1e1aec32e241c2b8d03404ce7d2c01d65eb6d5674c8f27b1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-09-24T11:22:59Z",
    "title_canon_sha256": "9788a695af571df2872c66fffe13311c6ea250c2963e168ae65485e511a4b992"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.07318",
    "kind": "arxiv",
    "version": 1
  }
}