Pith Number

pith:4JD7WHNG

pith:2020:4JD7WHNG6UMD4N25WCGJZFGKZR

not attested not anchored not stored refs pending

Limits to Energy Conversion

Arjan van der Schaft, Dimitri Jeltsema

arxiv:2006.15953 v1 · 2020-06-29 · 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{4JD7WHNG6UMD4N25WCGJZFGKZR}

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	2026-07-05T01:14:11.122218Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e247fb1da6f5183e375db08c9c94cacc5650600c7456544a33247cc5b83c432a

Aliases

arxiv: 2006.15953 · arxiv_version: 2006.15953v1 · doi: 10.48550/arxiv.2006.15953 · pith_short_12: 4JD7WHNG6UMD · pith_short_16: 4JD7WHNG6UMD4N25 · pith_short_8: 4JD7WHNG

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/4JD7WHNG6UMD4N25WCGJZFGKZR \
  | 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: e247fb1da6f5183e375db08c9c94cacc5650600c7456544a33247cc5b83c432a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8bbfb8d91386cf4eceeced583b9ee9f2deae9b3f8b9a87a769265e9499717168",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2020-06-29T11:49:05Z",
    "title_canon_sha256": "fc69e6efbe3f817bf303bf887bbdf676eeb7d230788b39c7ae97cdb2cc590cfa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2006.15953",
    "kind": "arxiv",
    "version": 1
  }
}