Pith Number

pith:QMJYHEPV

pith:2015:QMJYHEPVNV746KWMNMPSUTTBV5

not attested not anchored not stored refs pending

Counting isomorphism classes of $\beta$-normal linear lambda terms

Noam Zeilberger

arxiv:1509.07596 v1 · 2015-09-25 · cs.LO · math.CO · math.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{QMJYHEPVNV746KWMNMPSUTTBV5}

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	2026-05-18T01:32:02.399075Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83138391f56d7fcf2acc6b1f2a4e61af54bb9231593259499522dc5375cf6b3e

Aliases

arxiv: 1509.07596 · arxiv_version: 1509.07596v1 · doi: 10.48550/arxiv.1509.07596 · pith_short_12: QMJYHEPVNV74 · pith_short_16: QMJYHEPVNV746KWM · pith_short_8: QMJYHEPV

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/QMJYHEPVNV746KWMNMPSUTTBV5 \
  | 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: 83138391f56d7fcf2acc6b1f2a4e61af54bb9231593259499522dc5375cf6b3e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2118678a5a9df4dc84700ff16a068f46288a70066d96daf87030a91b815e7797",
    "cross_cats_sorted": [
      "math.CO",
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2015-09-25T06:23:04Z",
    "title_canon_sha256": "94f37cd527406a2e63c03e251ce4e95d01fe495865f36dff2e65cfe94128c133"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.07596",
    "kind": "arxiv",
    "version": 1
  }
}