Pith Number

pith:L4D3V3Z6

pith:2017:L4D3V3Z6OUNQBC2YIFYBBBQBUC

not attested not anchored not stored refs pending

A convex penalty for switching control of partial differential equations

Armin Rund, Christian Clason, Karl Kunisch, Richard C. Barnard

arxiv:1702.07505 v1 · 2017-02-24 · 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{L4D3V3Z6OUNQBC2YIFYBBBQBUC}

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	2026-05-18T00:50:03.114111Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f07baef3e751b008b584170108601a0bd131fa20784c4505bab86ef82e22d25

Aliases

arxiv: 1702.07505 · arxiv_version: 1702.07505v1 · doi: 10.48550/arxiv.1702.07505 · pith_short_12: L4D3V3Z6OUNQ · pith_short_16: L4D3V3Z6OUNQBC2Y · pith_short_8: L4D3V3Z6

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/L4D3V3Z6OUNQBC2YIFYBBBQBUC \
  | 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: 5f07baef3e751b008b584170108601a0bd131fa20784c4505bab86ef82e22d25

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e2f612528d568da664a6cd05142446b96c33aa7fc73b0e439246e3fc963f1058",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-02-24T09:19:19Z",
    "title_canon_sha256": "e8bd63640bfd8df90038357ac96f4e785677179e9315cc463a2488d8c8e1f4c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.07505",
    "kind": "arxiv",
    "version": 1
  }
}