Pith Number

pith:JNFSIHKM

pith:2015:JNFSIHKMEKOFDGAO77IFAJDE6Y

not attested not anchored not stored refs pending

A geometric approach to differential Hamiltonian systems and differential Riccati equations

Arjan van der Schaft

arxiv:1504.02289 v1 · 2015-04-09 · 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{JNFSIHKMEKOFDGAO77IFAJDE6Y}

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	2026-05-18T02:19:15.514639Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4b4b241d4c229c51980effd0502464f637e7ef8905be7800960c5400cdf75573

Aliases

arxiv: 1504.02289 · arxiv_version: 1504.02289v1 · doi: 10.48550/arxiv.1504.02289 · pith_short_12: JNFSIHKMEKOF · pith_short_16: JNFSIHKMEKOFDGAO · pith_short_8: JNFSIHKM

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/JNFSIHKMEKOFDGAO77IFAJDE6Y \
  | 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: 4b4b241d4c229c51980effd0502464f637e7ef8905be7800960c5400cdf75573

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0cfcb570b67ec8f6ef7f92ac2bfe3487a9a0181059848ebdcf2c7e268ccee56d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-04-09T13:04:28Z",
    "title_canon_sha256": "56a7fedaf3e6d35615b5bfede6df0d175f1a0643ecc92fbaa6d4bd198569d4d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.02289",
    "kind": "arxiv",
    "version": 1
  }
}