Pith Number

pith:NBCKDVXJ

pith:2019:NBCKDVXJRSTAOMZPUD7Y6VWJCC

not attested not anchored not stored refs pending

Increasing student engagement in math placement and preparation

Debra Lewis

arxiv:1907.00585 v1 · 2019-07-01 · math.HO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NBCKDVXJRSTAOMZPUD7Y6VWJCC}

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	2026-05-17T23:41:51.134523Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6844a1d6e98ca607332fa0ff8f56c9108255c724095ae00778033f7caed2e975

Aliases

arxiv: 1907.00585 · arxiv_version: 1907.00585v1 · doi: 10.48550/arxiv.1907.00585 · pith_short_12: NBCKDVXJRSTA · pith_short_16: NBCKDVXJRSTAOMZP · pith_short_8: NBCKDVXJ

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/NBCKDVXJRSTAOMZPUD7Y6VWJCC \
  | 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: 6844a1d6e98ca607332fa0ff8f56c9108255c724095ae00778033f7caed2e975

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc857161e8af854e01ff1cb43da22fbccea99329190c8e1ceb9f61a0736a6179",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2019-07-01T07:46:15Z",
    "title_canon_sha256": "4b1055680a7946bb188c2ca1731b9a89913f0179bc6d9d16c18981848b2948f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.00585",
    "kind": "arxiv",
    "version": 1
  }
}