Pith Number

pith:P57TOM4S

pith:2020:P57TOM4SVTJTRA7X7LCLZJSCGA

not attested not anchored not stored refs pending

An optimization problem in thermal insulation with Robin boundary conditions

Carlo Nitsch, Cristina Trombetti, Francesco Della Pietra, Riccardo Scala

arxiv:2008.02193 v1 · 2020-08-05 · math.AP · 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{P57TOM4SVTJTRA7X7LCLZJSCGA}

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	2026-07-05T01:24:59.669950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f7f373392acd33883f7fac4bca642302784d16e74c38bdc3871a6b3f3c29b25

Aliases

arxiv: 2008.02193 · arxiv_version: 2008.02193v1 · doi: 10.48550/arxiv.2008.02193 · pith_short_12: P57TOM4SVTJT · pith_short_16: P57TOM4SVTJTRA7X · pith_short_8: P57TOM4S

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/P57TOM4SVTJTRA7X7LCLZJSCGA \
  | 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: 7f7f373392acd33883f7fac4bca642302784d16e74c38bdc3871a6b3f3c29b25

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb79661138efba05bbba363d06b7108770996e8319b921b7ce9d875a23266de1",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2020-08-05T15:39:34Z",
    "title_canon_sha256": "3d42c8eb192939e44fed10c24bccef75ffb3d8ddc397b5c679b6c7346bab5eae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2008.02193",
    "kind": "arxiv",
    "version": 1
  }
}