Pith Number

pith:34KYDSGM

pith:2016:34KYDSGMDMLQBK3WGIZNEYSPGY

not attested not anchored not stored refs pending

A fast topology optimisation for material- and geometry-independent cloaking devices with the BEM and the ${\mathcal H}$-matrix method

Hiroshi Isakari, Kenta Nakamoto, Toru Takahashi, Toshiro Matsumoto

arxiv:1611.08072 v1 · 2016-11-24 · 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{34KYDSGMDMLQBK3WGIZNEYSPGY}

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	2026-05-18T00:56:44.510216Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df1581c8cc1b1700ab763232d2624f363e7a9e480700fdd77db9ff2fa6eb6809

Aliases

arxiv: 1611.08072 · arxiv_version: 1611.08072v1 · doi: 10.48550/arxiv.1611.08072 · pith_short_12: 34KYDSGMDMLQ · pith_short_16: 34KYDSGMDMLQBK3W · pith_short_8: 34KYDSGM

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/34KYDSGMDMLQBK3WGIZNEYSPGY \
  | 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: df1581c8cc1b1700ab763232d2624f363e7a9e480700fdd77db9ff2fa6eb6809

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42a23867692293b0c78fc903a1e362fa0ccafe3c6c826dd38ea689f8875a06df",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-11-24T05:57:42Z",
    "title_canon_sha256": "6f7d206861b60e6fc7ce38d1bb59aced93eb1c4d80f82e41af1aded05d1023e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.08072",
    "kind": "arxiv",
    "version": 1
  }
}