Pith Number

pith:D7YPB2KT

pith:2015:D7YPB2KTSG64CICYI5WADISQS6

not attested not anchored not stored refs pending

On incomplete lattice homomorphisms in subspaces of geometries: "half" a problem of Hartmanis from 1959

Dominic van der Zypen, Jonathan David Farley

arxiv:1510.06513 v1 · 2015-10-22 · 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{D7YPB2KTSG64CICYI5WADISQS6}

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	2026-05-18T01:29:30.800839Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1ff0f0e95391bdc12058476c01a25097926d1dfa5318eed149f84e3e035c7346

Aliases

arxiv: 1510.06513 · arxiv_version: 1510.06513v1 · doi: 10.48550/arxiv.1510.06513 · pith_short_12: D7YPB2KTSG64 · pith_short_16: D7YPB2KTSG64CICY · pith_short_8: D7YPB2KT

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/D7YPB2KTSG64CICYI5WADISQS6 \
  | 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: 1ff0f0e95391bdc12058476c01a25097926d1dfa5318eed149f84e3e035c7346

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0eb729b623f2fa934e9530048b81e3e416abd93db1f3a3f558d221de393c0f3a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-10-22T08:08:03Z",
    "title_canon_sha256": "0b6bc4ab1d6a155bb50af4aed2b33296f8e055cbf620c69121cfe4710e0640d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.06513",
    "kind": "arxiv",
    "version": 1
  }
}