Pith Number

pith:SSCNSB5A

pith:2015:SSCNSB5ABVMAWQBYLTWQXPNAFW

not attested not anchored not stored refs pending

Identifying Student Difficulties with Entropy, Heat Engines, and the Carnot Cycle

Donald B. Mountcastle, John R. Thompson, Trevor I. Smith, Warren M. Christensen

arxiv:1508.04104 v1 · 2015-08-17 · physics.ed-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{SSCNSB5ABVMAWQBYLTWQXPNAFW}

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	2026-05-18T01:28:46.902102Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9484d907a00d580b40385ced0bbda02db1ab0c63ae58f9bd28a6a468f2a1f6f8

Aliases

arxiv: 1508.04104 · arxiv_version: 1508.04104v1 · doi: 10.48550/arxiv.1508.04104 · pith_short_12: SSCNSB5ABVMA · pith_short_16: SSCNSB5ABVMAWQBY · pith_short_8: SSCNSB5A

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/SSCNSB5ABVMAWQBYLTWQXPNAFW \
  | 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: 9484d907a00d580b40385ced0bbda02db1ab0c63ae58f9bd28a6a468f2a1f6f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "740904c9abb45bd73dcf4315bb392624a4a19ecf598d168f42081ba6e8c1d57b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2015-08-17T18:34:53Z",
    "title_canon_sha256": "af72172a56f59ab05b37e963d9909930f242b407e4f8da305225b65a648ea981"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.04104",
    "kind": "arxiv",
    "version": 1
  }
}