Pith Number

pith:FPFCLFYY

pith:2013:FPFCLFYYOHYHXBA2XCN7JB26WO

not attested not anchored not stored refs pending

Problem Roulette: Studying Introductory Physics in the Cloud

August E. Evrard, David Winn, Jared Tritz, Kathryn Jones, Michael Mills, Timothy A. McKay

arxiv:1309.7678 v1 · 2013-09-30 · 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{FPFCLFYYOHYHXBA2XCN7JB26WO}

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	2026-05-18T03:11:48.741709Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2bca25971871f07b841ab89bf4875eb38db3c2b5f1612949074ef789b869e6d8

Aliases

arxiv: 1309.7678 · arxiv_version: 1309.7678v1 · doi: 10.48550/arxiv.1309.7678 · pith_short_12: FPFCLFYYOHYH · pith_short_16: FPFCLFYYOHYHXBA2 · pith_short_8: FPFCLFYY

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/FPFCLFYYOHYHXBA2XCN7JB26WO \
  | 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: 2bca25971871f07b841ab89bf4875eb38db3c2b5f1612949074ef789b869e6d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f24bf52ef6f5d13c93b0442e9de2523996cf528faa83d89ef77dc30b541649b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2013-09-30T00:03:26Z",
    "title_canon_sha256": "67396df95bad9055ff4e4afbc6c6512006988e3b0ac9a4bff56b69c160ff60a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.7678",
    "kind": "arxiv",
    "version": 1
  }
}