Pith Number

pith:5OM4ZMP2

pith:2019:5OM4ZMP22RPHHWAR7ZNMZKPPD3

not attested not anchored not stored refs pending

A Bridge Anchored on Both Sides: Formal Deduction in Introductory CS, and Code Proofs in Discrete Math

David G. Wonnacott, Peter-Michael Osera

arxiv:1907.04134 v1 · 2019-07-07 · cs.PL · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5OM4ZMP22RPHHWAR7ZNMZKPPD3}

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	2026-05-17T23:41:03.235013Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eb99ccb1fad45e73d811fe5acca9ef1ed018c6ba4105ae682d81507c9b689aac

Aliases

arxiv: 1907.04134 · arxiv_version: 1907.04134v1 · doi: 10.48550/arxiv.1907.04134 · pith_short_12: 5OM4ZMP22RPH · pith_short_16: 5OM4ZMP22RPHHWAR · pith_short_8: 5OM4ZMP2

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/5OM4ZMP22RPHHWAR7ZNMZKPPD3 \
  | 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: eb99ccb1fad45e73d811fe5acca9ef1ed018c6ba4105ae682d81507c9b689aac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3eaf62b097b90b5d050c83d461f1c4478fdefeab97a6aacd61454971736ba291",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2019-07-07T15:33:35Z",
    "title_canon_sha256": "adf73cac463240533f63650a35c62cd1eea8d42d9e30771e49ae9ed5627fa96c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.04134",
    "kind": "arxiv",
    "version": 1
  }
}