Pith Number

pith:X5SJFNL4

pith:2016:X5SJFNL4OW5FABML6CQDI5FJ6P

not attested not anchored not stored refs pending

Can multiple-choice questions simulate free-response questions?

Chandralekha Singh, Shih-Yin Lin

arxiv:1603.07910 v1 · 2016-02-20 · 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{X5SJFNL4OW5FABML6CQDI5FJ6P}

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	2026-05-18T01:06:33.157696Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf6492b57c75ba50058bf0a03474a9f3c3d6a9080af139ca64da135c0f3999a8

Aliases

arxiv: 1603.07910 · arxiv_version: 1603.07910v1 · doi: 10.48550/arxiv.1603.07910 · pith_short_12: X5SJFNL4OW5F · pith_short_16: X5SJFNL4OW5FABML · pith_short_8: X5SJFNL4

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/X5SJFNL4OW5FABML6CQDI5FJ6P \
  | 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: bf6492b57c75ba50058bf0a03474a9f3c3d6a9080af139ca64da135c0f3999a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af84c9c141aab20eb7ab3ff3a28c777fec1349af5d4a5bbff9e62ac37edb659b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2016-02-20T09:51:28Z",
    "title_canon_sha256": "654f49824844433bb30710c9fcb83bb2161fe03e2f58128180fbaa3a5e53c099"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.07910",
    "kind": "arxiv",
    "version": 1
  }
}