Pith Number

pith:6L2KQWIC

pith:2019:6L2KQWIC4XDTUKNOSM4FSX6H6M

not attested not anchored not stored refs pending

Unsharp residuation in effect algebras

Helmut L\"anger, Ivan Chajda

arxiv:1907.02738 v1 · 2019-07-05 · 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{6L2KQWIC4XDTUKNOSM4FSX6H6M}

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	2026-05-17T23:41:23.337338Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f2f4a85902e5c73a29ae9338595fc7f309478a918a1ed7fa6a544d54bbb45724

Aliases

arxiv: 1907.02738 · arxiv_version: 1907.02738v1 · doi: 10.48550/arxiv.1907.02738 · pith_short_12: 6L2KQWIC4XDT · pith_short_16: 6L2KQWIC4XDTUKNO · pith_short_8: 6L2KQWIC

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/6L2KQWIC4XDTUKNOSM4FSX6H6M \
  | 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: f2f4a85902e5c73a29ae9338595fc7f309478a918a1ed7fa6a544d54bbb45724

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15c49092fd5ea8b6e5f56f8fc70054223e4da56bdc90d6cc0f9aea709a227064",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2019-07-05T09:31:21Z",
    "title_canon_sha256": "78e682c1a641e0f7423283ae12a285dcf40b43f09999abf19e05ac4a5c7085f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.02738",
    "kind": "arxiv",
    "version": 1
  }
}