Pith Number

pith:NGG5TOTD

pith:2020:NGG5TOTDQWXIAAZ2JSQCERWZ2E

not attested not anchored not stored refs pending

Stirling engine operating at low temperature difference

Alejandro Romanelli

arxiv:2003.07157 v1 · 2020-03-10 · cond-mat.stat-mech · physics.pop-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NGG5TOTDQWXIAAZ2JSQCERWZ2E}

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	2026-07-05T01:29:56.336677Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

698dd9ba6385ae80033a4ca02246d9d10c28d5c3e6b86e58cd38ff62e714fa9d

Aliases

arxiv: 2003.07157 · arxiv_version: 2003.07157v1 · doi: 10.48550/arxiv.2003.07157 · pith_short_12: NGG5TOTDQWXI · pith_short_16: NGG5TOTDQWXIAAZ2 · pith_short_8: NGG5TOTD

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/NGG5TOTDQWXIAAZ2JSQCERWZ2E \
  | 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: 698dd9ba6385ae80033a4ca02246d9d10c28d5c3e6b86e58cd38ff62e714fa9d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e19dd388aa2c5d217de8fce635f989dbad74687480b6364555e45b00550b8a28",
    "cross_cats_sorted": [
      "physics.pop-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.stat-mech",
    "submitted_at": "2020-03-10T23:06:12Z",
    "title_canon_sha256": "9f57cd9dcc16c6fc4ec312ae2cced891e5638798cc7286a8c218b26aebb79169"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.07157",
    "kind": "arxiv",
    "version": 1
  }
}