Pith Number

pith:3ODHKR2P

pith:2019:3ODHKR2PKT73KBL3UEQV5M65W3

not attested not anchored not stored refs pending

From lecture to active learning: Rewards for all, and is it really so difficult?

David Pengelley

arxiv:1908.02389 v1 · 2019-08-06 · 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{3ODHKR2PKT73KBL3UEQV5M65W3}

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	2026-07-05T00:28:51.742933Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db8675474f54ffb5057ba1215eb3ddb6e380575e65c5af6c344c8839167195fe

Aliases

arxiv: 1908.02389 · arxiv_version: 1908.02389v1 · doi: 10.48550/arxiv.1908.02389 · pith_short_12: 3ODHKR2PKT73 · pith_short_16: 3ODHKR2PKT73KBL3 · pith_short_8: 3ODHKR2P

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/3ODHKR2PKT73KBL3UEQV5M65W3 \
  | 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: db8675474f54ffb5057ba1215eb3ddb6e380575e65c5af6c344c8839167195fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac18773aaccd9850231915b288a476df342a328d5837863818017905b1f08c2f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2019-08-06T22:41:58Z",
    "title_canon_sha256": "8756d937253167462115c7cbc54a3642b6067475ddbeb721bdb33604ae9bffc1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.02389",
    "kind": "arxiv",
    "version": 1
  }
}