Pith Number

pith:2DBOUJHA

pith:2015:2DBOUJHAYY5U34SV47U6BD7ONR

not attested not anchored not stored refs pending

On Galois Connections between External Operations and Relational Constraints: Arity Restrictions and Operator Decompositions

Miguel Couceiro

arxiv:1508.01568 v1 · 2015-08-06 · math.RA · 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{2DBOUJHAYY5U34SV47U6BD7ONR}

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	2026-05-18T01:35:39.376951Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0c2ea24e0c63b4df255e7e9e08fee6c5e366cbe6840047fdc43edb806161f0e

Aliases

arxiv: 1508.01568 · arxiv_version: 1508.01568v1 · doi: 10.48550/arxiv.1508.01568 · pith_short_12: 2DBOUJHAYY5U · pith_short_16: 2DBOUJHAYY5U34SV · pith_short_8: 2DBOUJHA

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/2DBOUJHAYY5U34SV47U6BD7ONR \
  | 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: d0c2ea24e0c63b4df255e7e9e08fee6c5e366cbe6840047fdc43edb806161f0e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d3d9d2bed4388f64ae24f4b116f2b55043367738b558d983ccec068d712e8d5a",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2015-08-06T23:35:41Z",
    "title_canon_sha256": "fd62c036315750d329dc3e772f9b03565a9dc57213152216ad21363e5461c83d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.01568",
    "kind": "arxiv",
    "version": 1
  }
}