Pith Number

pith:SPDV5DK6

pith:2018:SPDV5DK6JIC5Q4ZGCJUAX4DL3H

not attested not anchored not stored refs pending

Observer-based boundary control of the sine-Gordon model energy

Alexander L. Fradkov, Boris Andrievsky, Maksim Dolgopolik

arxiv:1801.06569 v1 · 2018-01-19 · 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{SPDV5DK6JIC5Q4ZGCJUAX4DL3H}

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	2026-05-18T00:25:28.384231Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93c75e8d5e4a05d8732612680bf06bd9f7e9b393a81df83f90706e0616e20095

Aliases

arxiv: 1801.06569 · arxiv_version: 1801.06569v1 · doi: 10.48550/arxiv.1801.06569 · pith_short_12: SPDV5DK6JIC5 · pith_short_16: SPDV5DK6JIC5Q4ZG · pith_short_8: SPDV5DK6

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/SPDV5DK6JIC5Q4ZGCJUAX4DL3H \
  | 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: 93c75e8d5e4a05d8732612680bf06bd9f7e9b393a81df83f90706e0616e20095

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "51f36c01d1414fb650758ec86c13af8adf1e50cd3085d9453535eb96919f7581",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-01-19T20:49:24Z",
    "title_canon_sha256": "69142d008627100297f864d4487c1b51fbf352cf5ef7dfb8eccbd3c3ac2124c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.06569",
    "kind": "arxiv",
    "version": 1
  }
}