Pith Number

pith:TDXD7ECI

pith:2011:TDXD7ECIJF7ZUXXS3DB7EGDBOE

not attested not anchored not stored refs pending

Arnautov's problems on semitopological isomorphisms

Anna Giordano Bruno, Dikran Dikranjan

arxiv:1105.3649 v1 · 2011-05-18 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TDXD7ECIJF7ZUXXS3DB7EGDBOE}

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	2026-05-18T04:21:52.157504Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

98ee3f9048497f9a5ef2d8c3f218617131183a053104fd6e9f41f8ed2fd8bfdc

Aliases

arxiv: 1105.3649 · arxiv_version: 1105.3649v1 · doi: 10.48550/arxiv.1105.3649 · pith_short_12: TDXD7ECIJF7Z · pith_short_16: TDXD7ECIJF7ZUXXS · pith_short_8: TDXD7ECI

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/TDXD7ECIJF7ZUXXS3DB7EGDBOE \
  | 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: 98ee3f9048497f9a5ef2d8c3f218617131183a053104fd6e9f41f8ed2fd8bfdc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "718f1b80e001e70d0bca2524d0da0c7179f1d8cf0c17ef0251e53b8e066a94e6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2011-05-18T14:33:42Z",
    "title_canon_sha256": "68099d574dfe96741d7d5c784437e34e9e63b696364ded8eee770615bb0704d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.3649",
    "kind": "arxiv",
    "version": 1
  }
}