Pith Number

pith:TCGHVFW2

pith:2021:TCGHVFW2HQ6SHSUGTA2AVJNX3C

not attested not anchored not stored refs pending

Experience gravity in the classroom using the rubber sheet: an educational proposal from the collaboration between University and School

Adriana Postiglione, Ilaria De Angelis

arxiv:2101.04652 v1 · 2021-01-12 · 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{TCGHVFW2HQ6SHSUGTA2AVJNX3C}

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	2026-07-05T02:10:28.407162Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

988c7a96da3c3d23ca8698340aa5b7d8a664c46c3bfadcd47e203692120c23ad

Aliases

arxiv: 2101.04652 · arxiv_version: 2101.04652v1 · doi: 10.48550/arxiv.2101.04652 · pith_short_12: TCGHVFW2HQ6S · pith_short_16: TCGHVFW2HQ6SHSUG · pith_short_8: TCGHVFW2

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/TCGHVFW2HQ6SHSUGTA2AVJNX3C \
  | 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: 988c7a96da3c3d23ca8698340aa5b7d8a664c46c3bfadcd47e203692120c23ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55e9d7e96ff2b0d0fcb0062889cd5e0284a5535bb4e69697daf4427149ad5fbc",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2021-01-12T18:25:34Z",
    "title_canon_sha256": "1e4c33912a29f939b48891f5f5fc5ba23fc39ed160d0e235cc380d5e3a80e225"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.04652",
    "kind": "arxiv",
    "version": 1
  }
}