Pith Number

pith:SDQDVYZX

pith:2019:SDQDVYZXZGEOLGCTUV6ESIRIFS

not attested not anchored not stored refs pending

Physics teaching assistants' views of different types of introductory problems: Challenge of perceiving the instructional benefits of context-rich and multiple-choice problems

Chandralekha Singh, Edit Yerushalmi, Emily Marshman, Melanie Good

arxiv:1907.00521 v1 · 2019-07-01 · 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{SDQDVYZXZGEOLGCTUV6ESIRIFS}

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	2026-05-17T23:41:51.372468Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90e03ae337c988e59853a57c4922282c8cd96b5e8e5c86cb6da9072f428d66c6

Aliases

arxiv: 1907.00521 · arxiv_version: 1907.00521v1 · doi: 10.48550/arxiv.1907.00521 · pith_short_12: SDQDVYZXZGEO · pith_short_16: SDQDVYZXZGEOLGCT · pith_short_8: SDQDVYZX

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/SDQDVYZXZGEOLGCTUV6ESIRIFS \
  | 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: 90e03ae337c988e59853a57c4922282c8cd96b5e8e5c86cb6da9072f428d66c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "501c4484d989038d77654657e394e74cc41d57bfd6276237173ceccae3d89592",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2019-07-01T03:03:01Z",
    "title_canon_sha256": "7cb18581dd26c5360dc7a59f0c8b4e18bf689a474e17f624fe21eff0c85ac52c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.00521",
    "kind": "arxiv",
    "version": 1
  }
}