Pith Number

pith:4KCDGHXI

pith:2019:4KCDGHXI6EECCCFAIBH6V7JS6Q

not attested not anchored not stored refs pending

Teaching Physics at School and Colleges

Mikhail Shifman

arxiv:1902.03323 v1 · 2019-02-08 · 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{4KCDGHXI6EECCCFAIBH6V7JS6Q}

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	2026-05-17T23:54:21.230170Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e284331ee8f1082108a0404feafd32f404a8676b250e40492fbee656fb72d536

Aliases

arxiv: 1902.03323 · arxiv_version: 1902.03323v1 · doi: 10.48550/arxiv.1902.03323 · pith_short_12: 4KCDGHXI6EEC · pith_short_16: 4KCDGHXI6EECCCFA · pith_short_8: 4KCDGHXI

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/4KCDGHXI6EECCCFAIBH6V7JS6Q \
  | 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: e284331ee8f1082108a0404feafd32f404a8676b250e40492fbee656fb72d536

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8bc79aa72194e06b2aad78c088f25c2ece2833bc0dfd54c7a89abc20e6cb65d9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2019-02-08T23:05:49Z",
    "title_canon_sha256": "26904993c8687492aad90c8178721bee8553b3979974e34a0b866fc5a2ff2bad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.03323",
    "kind": "arxiv",
    "version": 1
  }
}