Pith Number

pith:S5WHJX7I

pith:2013:S5WHJX7IDI3ALKJP6Q2DDC3RXP

not attested not anchored not stored refs pending

Who teaches science in Alagoas? A quantitative analysis of non-specialist teaching at primary and secondary schools in Brazil

Elton Fireman, Jose Renan Gomes, Robert Fischer

arxiv:1304.8055 v1 · 2013-04-30 · 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{S5WHJX7IDI3ALKJP6Q2DDC3RXP}

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	2026-05-18T03:26:51.027945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

976c74dfe81a3605a92ff434318b71bbd8dd92df2b3281f0a38cdac7cdf60a72

Aliases

arxiv: 1304.8055 · arxiv_version: 1304.8055v1 · doi: 10.48550/arxiv.1304.8055 · pith_short_12: S5WHJX7IDI3A · pith_short_16: S5WHJX7IDI3ALKJP · pith_short_8: S5WHJX7I

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/S5WHJX7IDI3ALKJP6Q2DDC3RXP \
  | 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: 976c74dfe81a3605a92ff434318b71bbd8dd92df2b3281f0a38cdac7cdf60a72

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "941d9b3e4057d09196fb7974fdee46c4055eb0e294a53f526ed32306122df9cf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2013-04-30T16:25:54Z",
    "title_canon_sha256": "0a52d580c7e9652c6e6eb1c018182352cbf6f1bfbd061aa741940f500e95166d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.8055",
    "kind": "arxiv",
    "version": 1
  }
}