Pith Number

pith:FBTW7VHN

pith:2012:FBTW7VHNXRUG4JK67RCXE2KQXI

not attested not anchored not stored refs pending

The basis problem for subspaces of monotonically normal compacta

Ahmad Farhat

arxiv:1202.4018 v2 · 2012-02-17 · math.GN

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FBTW7VHNXRUG4JK67RCXE2KQXI}

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	2026-05-18T01:10:41.815808Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28676fd4edbc686e255efc45726950ba0c703253a297a30975f0393c94a2947d

Aliases

arxiv: 1202.4018 · arxiv_version: 1202.4018v2 · doi: 10.48550/arxiv.1202.4018 · pith_short_12: FBTW7VHNXRUG · pith_short_16: FBTW7VHNXRUG4JK6 · pith_short_8: FBTW7VHN

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/FBTW7VHNXRUG4JK67RCXE2KQXI \
  | 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: 28676fd4edbc686e255efc45726950ba0c703253a297a30975f0393c94a2947d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1e97761a9e325c21dafc0680049cd2838f9a40977dceef3f1b1104b743c5c73e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2012-02-17T20:56:43Z",
    "title_canon_sha256": "aaca414c7b168d83764c877c5402fd62d4954d849fd4682e17ca415efa6e4d7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.4018",
    "kind": "arxiv",
    "version": 2
  }
}