Pith Number

pith:QVRRHZQ5

pith:1995:QVRRHZQ5SE5NV52RXLUKYMVIRG

not attested not anchored not stored refs pending

Semi-Cohen Boolean algebras

Bohuslav Balcar, Jind\v{r}ich Zapletal, Thomas Jech

arxiv:math/9506208 v1 · 1995-06-17 · 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{QVRRHZQ5SE5NV52RXLUKYMVIRG}

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	2026-05-18T01:05:48.614208Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

856313e61d913adaf751bae8ac32a88994b67b1fd9452d52da07af6f8554d749

Aliases

arxiv: math/9506208 · arxiv_version: math/9506208v1 · doi: 10.48550/arxiv.math/9506208 · pith_short_12: QVRRHZQ5SE5N · pith_short_16: QVRRHZQ5SE5NV52R · pith_short_8: QVRRHZQ5

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/QVRRHZQ5SE5NV52RXLUKYMVIRG \
  | 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: 856313e61d913adaf751bae8ac32a88994b67b1fd9452d52da07af6f8554d749

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f46cf8be6173220c72e6f6a8ab615dd423592be64d95456ec8031154281310ba",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.LO",
    "submitted_at": "1995-06-17T00:00:00Z",
    "title_canon_sha256": "778f4d2c95e8918a58f2d5e1205b3be9fe045e1b7d45409f2b5bbac0b7761ca6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9506208",
    "kind": "arxiv",
    "version": 1
  }
}