Pith Number

pith:S2QZDNDO

pith:2009:S2QZDNDOQ2EBG3CXQSOUXLQRXR

not attested not anchored not stored refs pending

The role of sign in students' modeling of scalar equations

Kate Hayes, Michael C. Wittmann

arxiv:0901.4912 v1 · 2009-01-30 · 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{S2QZDNDOQ2EBG3CXQSOUXLQRXR}

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	2026-05-18T02:14:54.908859Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

96a191b46e8688136c57849d4bae11bc597eb982907a02a18ecba25f4050c303

Aliases

arxiv: 0901.4912 · arxiv_version: 0901.4912v1 · doi: 10.48550/arxiv.0901.4912 · pith_short_12: S2QZDNDOQ2EB · pith_short_16: S2QZDNDOQ2EBG3CX · pith_short_8: S2QZDNDO

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/S2QZDNDOQ2EBG3CXQSOUXLQRXR \
  | 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: 96a191b46e8688136c57849d4bae11bc597eb982907a02a18ecba25f4050c303

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ef0eeef794679e197c9dcd3289766524925f6e98f74379d59ebe5018c9996f0c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2009-01-30T15:33:27Z",
    "title_canon_sha256": "a3fa62c8bc7775b3cefb6408118bbf9d4fb0bec7c4d8c88880a18f76ec32a339"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4912",
    "kind": "arxiv",
    "version": 1
  }
}