Pith Number

pith:5YCV2DMP

pith:2013:5YCV2DMPNTMF4JKXGWC7WTQOPB

not attested not anchored not stored refs pending

Detecting Concepts Crucial for Success in Mathematics Courses from Knowledge State-based Placement Data

Alison Ahlgren Reddy, Marc Harper

arxiv:1312.1127 v1 · 2013-12-02 · math.HO · 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{5YCV2DMPNTMF4JKXGWC7WTQOPB}

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	2026-05-18T03:05:34.880503Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ee055d0d8f6cd85e25573585fb4e0e7849375c57199fe0653d9062de979da47d

Aliases

arxiv: 1312.1127 · arxiv_version: 1312.1127v1 · doi: 10.48550/arxiv.1312.1127 · pith_short_12: 5YCV2DMPNTMF · pith_short_16: 5YCV2DMPNTMF4JKX · pith_short_8: 5YCV2DMP

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/5YCV2DMPNTMF4JKXGWC7WTQOPB \
  | 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: ee055d0d8f6cd85e25573585fb4e0e7849375c57199fe0653d9062de979da47d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "70d67d630aef612de34969e5a766b4924af78ddf5a80b9c311c65c72d685fbf4",
    "cross_cats_sorted": [
      "physics.ed-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2013-12-02T23:35:47Z",
    "title_canon_sha256": "369d86d4af8ef9cbc8306e330e76bff8b821613936403d66ba0e6d4d6bef81cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.1127",
    "kind": "arxiv",
    "version": 1
  }
}