Pith Number

pith:Y5VY6QTB

pith:2016:Y5VY6QTBZJY4KQMFRKZQHTR5XD

not attested not anchored not stored refs pending

Categorization of Quantum Mechanics Problems by Professors and Students

Chandralekha Singh, Shih-Yin Lin

arxiv:1603.02947 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{Y5VY6QTBZJY4KQMFRKZQHTR5XD}

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	2026-05-18T01:19:19.497919Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c76b8f4261ca71c541858ab303ce3db8ca7da8c9646ee11da313dcd18bf6a3e2

Aliases

arxiv: 1603.02947 · arxiv_version: 1603.02947v1 · doi: 10.48550/arxiv.1603.02947 · pith_short_12: Y5VY6QTBZJY4 · pith_short_16: Y5VY6QTBZJY4KQMF · pith_short_8: Y5VY6QTB

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/Y5VY6QTBZJY4KQMFRKZQHTR5XD \
  | 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: c76b8f4261ca71c541858ab303ce3db8ca7da8c9646ee11da313dcd18bf6a3e2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d2511fe10e6e825d40a5e790858ea8c1d7e0ad62ffcd1d3abf0e90c553e61ce",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2016-02-20T17:15:59Z",
    "title_canon_sha256": "d2f674da16cabfb4c77214d045f7fcb32b19b7bb3bed4811739bbccfe20c735c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.02947",
    "kind": "arxiv",
    "version": 1
  }
}