Pith Number

pith:HXBQRLLX

pith:2006:HXBQRLLX2QPOOHEK6DZX2DL6QG

not attested not anchored not stored refs pending

Selection Principles and special sets of reals: Open problems

Boaz Tsaban

arxiv:math/0609601 v5 · 2006-09-21 · math.GN · 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{HXBQRLLX2QPOOHEK6DZX2DL6QG}

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	2026-05-18T04:10:47.324245Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3dc308ad77d41ee71c8af0f37d0d7e81a11ac38a6179bbe8c4b62c4f07cd3ab7

Aliases

arxiv: math/0609601 · arxiv_version: math/0609601v5 · doi: 10.48550/arxiv.math/0609601 · pith_short_12: HXBQRLLX2QPO · pith_short_16: HXBQRLLX2QPOOHEK · pith_short_8: HXBQRLLX

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/HXBQRLLX2QPOOHEK6DZX2DL6QG \
  | 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: 3dc308ad77d41ee71c8af0f37d0d7e81a11ac38a6179bbe8c4b62c4f07cd3ab7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34d508c7a5db6223e5235a94b446007abd041524e358369322d8869968139328",
    "cross_cats_sorted": [
      "math.CO",
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2006-09-21T12:35:41Z",
    "title_canon_sha256": "16854a19b38bd12e05852575530aaebb175284dc39456b77e96d58efb3543be5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0609601",
    "kind": "arxiv",
    "version": 5
  }
}