Pith Number

pith:YSH6NW2B

pith:2017:YSH6NW2BX5USG45OKPL6UCJBBY

not attested not anchored not stored refs pending

Two optimization problems in thermal insulation

Carlo Nitsch, Dorin Bucur, Giuseppe Buttazzo

arxiv:1708.08202 v1 · 2017-08-28 · 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{YSH6NW2BX5USG45OKPL6UCJBBY}

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	2026-05-18T00:36:36.712495Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c48fe6db41bf692373ae53d7ea09210e1a9a7a9ea66581d153d54c00d3971d7f

Aliases

arxiv: 1708.08202 · arxiv_version: 1708.08202v1 · doi: 10.48550/arxiv.1708.08202 · pith_short_12: YSH6NW2BX5US · pith_short_16: YSH6NW2BX5USG45O · pith_short_8: YSH6NW2B

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/YSH6NW2BX5USG45OKPL6UCJBBY \
  | 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: c48fe6db41bf692373ae53d7ea09210e1a9a7a9ea66581d153d54c00d3971d7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6b41b3c5af1e296c1905d6aaf2055bb1ceab15a521701f559f8976cf25859b6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-08-28T06:22:47Z",
    "title_canon_sha256": "238c79fd9a6c7e25fe61d6f09fbf53e89fc5a536fa92ffa53b7f1be1f6bab297"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.08202",
    "kind": "arxiv",
    "version": 1
  }
}